Energy, work and power — Paper 2 · IGCSE Physics 0625

9 The table gives four energy sources and states whether the energy of the source is derived from the Sun. Which row is correct? source of energy derived from the Sun A geothermal yes B oil no C water held behind a dam yes D wind no

1 marks

Answer: C

This question in 0625/22 Feb/March 2016

10 A weight-lifter raises a 2000 N weight through a vertical height of 2.0 m in 0.80 s. What useful power does he develop in doing this? A 800 W B 3200 W C 4000 W D 5000 W

1 marks

Answer: D

This question in 0625/22 Feb/March 2016

11 A wind turbine generates 54 kW of useful power from an input of 180 kW of wind power. Which calculation gives the percentage efficiency of the turbine? 54 000 A % 180 000 × 100 180 000 B % 54 000 × 100 54 000 × 100 C % 180 000 180 000 × 100 D % 54 000

1 marks

Answer: C

This question in 0625/22 Feb/March 2016

10 A lorry of mass 4000 kg is travelling at a speed of 4.0 m / s. A car has a mass of 1000 kg. The kinetic energy of the car is equal to the kinetic energy of the lorry. What is the speed of the car? A 2.0 m / s B 4.0 m / s C 8.0 m / s D 16.0 m / s

1 marks

Answer: C

This question in 0625/21 May/June 2016

11 A force acts on an object and causes the object to move a certain distance, in the same direction as the force. Which row represents a situation in which the largest amount of work is done on the object by the force? force / N distance moved / m A 2.0 40.0 B 10.0 2.0 C 20.0 6.0 D 100.0 1.0

1 marks

Answer: C

This question in 0625/21 May/June 2016

9 A stone of mass m is held at rest in water. The stone is released and falls vertically a distance h. The stone reaches a speed v. Some of the original energy of the stone is transferred to the water. As it falls, resistive forces cause the temperature of the water and stone to increase. Which expression gives the work done against the resistive forces? A 1 mv 2 2 B mgh – 2 1 mv 2 C mgh D mgh + 2 1 mv 2

1 marks

Answer: B

This question in 0625/22 May/June 2016

10 Which energy resource does not derive its energy from the Sun? A geothermal B hydroelectric C oil D waves

1 marks

Answer: A

This question in 0625/22 May/June 2016

11 Some processes are more efficient than others. Which expression gives the efficiency of a process? total energy output A × 100% total energy input useful energy output B × 100% total energy input wasted energy output C × 100% total energy input wasted energy output D × 100% useful energy output

1 marks

Answer: B

This question in 0625/22 May/June 2016

9 Which energy resource does not derive its energy from the Sun? A hydroelectric B nuclear fission C waves D wind

1 marks

Answer: B

This question in 0625/23 May/June 2016

10 The diagram shows the energy used by a modern lamp. 60 W input of electrical power 12 W of 48 W of power useful power wasted in heating output as light surroundings Which expression gives the efficiency of the lamp? 12 × 100% 12 × 100% 48 × 100% 48 × 100% A B C D 60 48 60 12

1 marks

Answer: A

This question in 0625/23 May/June 2016

11 Three boxes each weigh 100 N. A man lifts all the boxes together from the ground on to a shelf that is 1.5 m above the ground. The man takes 2.0 s to do this. boxes shelf 1.5 m How much useful power does the man produce to lift the boxes? A 75 W B 225 W C 300 W D 900 W

1 marks

Answer: B

This question in 0625/23 May/June 2016

8 Two cars, P and Q, have different masses and different speeds as shown. mass mass 1000 kg 500 kg speed speed 10 m / s 20 m / s car P car Q Which row correctly compares the momentum and the kinetic energy of P with the momentum and the kinetic energy of Q? momentum kinetic energy A P greater than Q P equal to Q B P equal to Q P equal to Q C P equal to Q P less than Q D P less than Q P greater than Q

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2016

9 A car of mass 800 kg travels over a hill of height h. hill h NOT TO SCALE By travelling to the top of the hill, the car gains 40 000 J of gravitational potential energy. The gravitational field strength g is 10 N / kg. What is the height h of the hill? A 5.0 m B 20 m C 50 m D 500 m

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2016

10 A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings. What is the efficiency of the lamp? A 20% B 50% C 80% D 120%

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2016

11 The box contains the names of eight different energy resources. natural gas geothermal solar waves hydroelectric oil wind coal How many of these energy resources are renewable? A 3 B 4 C 5 D 6

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2016

10 Electricity can be generated using different energy resources. Which energy resource is used to generate electricity without needing any moving parts? A geothermal B hydroelectric C solar D water waves

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2016

11 A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings. What is the efficiency of the lamp? A 20% B 50% C 80% D 120%

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2016

12 A pendulum bob swings along the path WXYZ and back again. Resistive forces can be ignored. pendulum bob W Z X Y Which statement describes the total energy of the bob? A It has a maximum value at X. B It has a maximum value at Y. C It has a maximum value at Z. D It has the same value at W, X, Y and Z.

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2016

10 A ball is dropped onto a floor. Its speed just before hitting the floor is 3.0 m / s. Which change would result in a speed of 6.0 m / s just before hitting the floor? Ignore any effects due to air resistance. A Drop the ball from double the height above the floor. B Drop the ball from four times the height above the floor. C Use a ball with double the mass. D Use a ball with four times the mass.

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2016

11 Which list contains only energy resources that derive their energy from the Sun? A geothermal, nuclear, tidal B hydroelectric, water waves, wind C geothermal, hydroelectric, solar D nuclear, solar, water waves

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2016

12 A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings. What is the efficiency of the lamp? A 20% B 50% C 80% D 120%

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2016

9 A man can either take an escalator or a lift to travel up between two floors in a hotel. escalator lift The escalator takes 20 seconds to carry the man between the two floors. The useful work done against gravity is W. The useful power developed is P. The lift takes 30 seconds to carry the same man between the same two floors. How much useful work against gravity is done by the lift, and how much useful power is developed by the lift? useful work useful power done against developed by lift gravity by lift A more than W less than P B more than W P C W less than P D W P

1 marks

Answer: C

This question in 0625/22 Feb/March 2017

10 A 40 W lamp wastes 34 J of energy every second by heating its surroundings. What is the efficiency of the lamp? A 0.15% B 15% C 18% D 85%

1 marks

Answer: B

This question in 0625/22 Feb/March 2017

29 An air-conditioning unit, a lamp and an electric fire all receive electrical energy from the mains supply. From which of these devices is all this energy eventually transferred to the surroundings? air- va electric conditioning lamp fire unit A v v v B v x v Cc x v v D x x v key ¥ = all energy transferred to surroundings X = not all energy transferred to surroundings

1 marks

Answer: A

This question in 0625/22 Feb/March 2017

10 A box of mass m slides down a slope of length l and vertical height d against a frictional force F. mass m F l d stop As the box slides down the slope, it loses gravitational potential energy and it does work against the friction. Which row gives the loss in gravitational potential energy and the work done against friction? loss in gravitational work done potential energy against friction A mgd Fl B mgd Fd C mgl Fl D mgl Fd

1 marks

Answer: A

This question in 0625/21 May/June 2017

11 The diagram represents the energy transfers for a device. useful input output energy energy wasted output energy The device is 50% efficient. Which equation is correct? A input energy = useful output energy ÷ 2 B useful output energy = wasted output energy ÷ 2 C wasted output energy = useful output energy D wasted output energy = useful output energy ÷ 2

1 marks

Answer: C

This question in 0625/21 May/June 2017

12 A student carries out some simple exercises. In which exercise is the most work done? A B lifting pushing through through 1 m 1 m against a frictional force of 4 N 1 kg 1 kg C D lifting pulling through through 2 m 2 m against a frictional force of 2 N 2 kg 2 kg

1 marks

Answer: C

This question in 0625/21 May/June 2017

10 An object falls from a height of 5.0 m. Air resistance can be ignored. As it hits the ground the object has 750 J of kinetic energy. What is its mass? A 15 kg B 50 kg C 75 kg D 150 kg

1 marks

Answer: A

This question in 0625/22 May/June 2017

11 An electric generator produces an electromotive force (e.m.f.) of 200 V and produces a current of 3.0 A in a circuit. The generator is driven by an engine with a power of 2.4 kW. What is the efficiency of the generator? A 2.8% B 25% C 28% D 36%

1 marks

Answer: B

This question in 0625/22 May/June 2017

12 The diagrams show athletes training by stretching springs. Each spring has the same stiffness. Which athlete does the most work? A B one spring stretched one spring stretched by 0.60 m by 0.80 m C D two springs stretched two springs stretched by 0.60 m by 0.80 m

1 marks

Answer: D

This question in 0625/22 May/June 2017

9 The diagrams show four bodies moving in the directions shown. The only forces acting on the bodies are shown in each diagram. Which body gains the most kinetic energy when moving a distance of 1.0 m? A B 20 N movement movement 10 N 10 N C D 10 N 25 N 30 N 30 N movement movement

1 marks

Answer: C

This question in 0625/23 May/June 2017

10 A steel ball is fired vertically upwards with a velocity v. The ball reaches a height h. The same ball is now fired vertically upwards from the same position with a velocity 2v. Air resistance can be ignored. What is the new height reached by the ball? A h B 2h C 4h D 8h

1 marks

Answer: C

This question in 0625/23 May/June 2017

11 A solar panel is used to recharge a battery. The solar panel produces 0.80 W of electrical power. The panel is 20% efficient. solar panel sunlight power to battery 0.80 W What is the power input of the sunlight onto the solar panel? A 0.16 W B 4.0 W C 8.0 W D 16 W

1 marks

Answer: B

This question in 0625/23 May/June 2017

12 The diagrams show four different athletes training by doing pull-ups. Which athlete does the most work? A B C D weight of weight of weight of weight of athlete = 700 N athlete = 700 N athlete = 800 N athlete = 800 N distance distance distance distance lifted = 0.50 m lifted = 0.55 m lifted = 0.50 m lifted = 0.55 m

1 marks

Answer: D

This question in 0625/23 May/June 2017

16 Equal masses of two different liquids are put into identical beakers. Liquid 1 is heated for 100 s and liquid 2 is heated for 200 s by heaters of the same power. Each liquid has the same rise in temperature. different liquids of same mass liquid 1 liquid 2 heating time = 100 s heating time = 200 s Which statement is correct? A Each beaker of liquid has the same thermal capacity. B Each beaker of liquid receives the same energy. C Liquid 1 receives more energy than liquid 2. D The thermal capacity of liquid 1 is less than the thermal capacity of liquid 2.

1 marks

Answer: D

This question in 0625/23 May/June 2017

10 The diagram shows the path of a stone that is thrown from X and reaches its maximum height at Y. Y path of stone X The stone gains 10 J of gravitational potential energy as it moves from X to Y. The stone has 2.0 J of kinetic energy at Y. Air resistance can be ignored. How much kinetic energy did the stone have immediately after it was thrown at X? A 2.0 J B 8.0 J C 10 J D 12 J

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2017

11 A motor is used to lift a load of 40 N. motor load lifted through 0.50 m load 40 N The power of the motor is 40 W and the system is 20% efficient. How long does it take the motor to lift the load through 0.50 m? A 0.50 s B 2.5 s C 5.0 s D 25 s

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2017

12 A student runs up a flight of stairs. height length Which information is not needed to calculate the rate at which the student is doing work against gravity? A the height of the flight of stairs B the length of the flight of stairs C the time taken to run up the stairs D the weight of the student

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2017

32 A torch has a simple circuit with a 3.0 V battery and a lamp. There is a 20 mA current in the lamp. How much energy is transferred to the lamp in 5.0 minutes? A 0.30 J B 18 J C 60 J D 0.30 kJ

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2017

10 An object has a mass of 500 kg. It moves with a speed of 30 m / s. What is its kinetic energy? A 7.5 kJ B 15 kJ C 225 kJ D 450 kJ

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2017

11 Different processes have different efficiencies. Which row shows the most efficient process? energy useful energy input / J output / J A 10 3 B 40 10 C 100 25 D 2000 250

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2017

12 A student runs up a flight of stairs. height length Which information is not needed to calculate the rate at which the student is doing work against gravity? A the height of the flight of stairs B the length of the flight of stairs C the time taken to run up the stairs D the weight of the student

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2017

10 A car, starting from rest at position X, accelerates up a hill. The car reaches a speed of 10 m / s at position Y. The kinetic energy of the car at position Y is equal to its gain in gravitational potential energy from X to Y. Y X gain in height of car Take the gravitational field strength g to be 10 N / kg. What is the gain in height of the car between X and Y? A 0.50 m B 5.0 m C 10 m D 50 m

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2017

11 A 150 W filament lamp has an efficiency of 10%. A 40 W compact fluorescent lamp (CFL) has an efficiency of 30%. Each lamp is switched on for the same amount of time. Which lamp produces more light and which lamp converts more energy into other forms of energy? converts more energy produces more light into other forms A CFL lamp CFL lamp B CFL lamp filament lamp C filament lamp CFL lamp D filament lamp filament lamp

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2017

12 A student runs up a flight of stairs. height length Which information is not needed to calculate the rate at which the student is doing work against gravity? A the height of the flight of stairs B the length of the flight of stairs C the time taken to run up the stairs D the weight of the student

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2017

32 A battery is connected to a circuit. It is switched on for 1.0 minute. During that time, there is a current of 0.40 A in the circuit and the battery supplies a total of 48 J of energy. Which row gives the charge that passes and the electromotive force (e.m.f.) of the battery? charge that passes e.m.f. of the in 1.0 minute / C battery / V A 0.40 2.0 B 0.40 120 C 24 2.0 D 24 120

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2017

10 As energy is transferred into different forms, it eventually becomes dissipated. What does this mean? A All the energy disappears. B The energy finally changes into every possible form of energy. C The energy spreads out among the objects and their surroundings. D The total amount of energy becomes less.

1 marks

Answer: C

This question in 0625/21 May/June 2018

11 A ball of mass 1.2 kg is dropped from a height of 30 m. As it falls, 25% of its initial gravitational potential energy is transferred to thermal energy. What is the kinetic energy of the ball just before it hits the ground? A 27 J B 90 J C 270 J D 360 J

1 marks

Answer: C

This question in 0625/21 May/June 2018

12 A girl hangs by her hands from a bar in the gymnasium. She pulls herself up until her chin is level with the bar. The mass of the girl is 48 kg. She pulls herself up through a distance of 0.25 m. She does this in 2.0 s. What is the useful power she uses to pull herself up? A 6.0 W B 24 W C 60 W D 240 W

1 marks

Answer: C

This question in 0625/21 May/June 2018

29 A water heater is connected to a 230 V supply and there is a current of 26 A in the heater. It takes 20 minutes to heat the water to the required temperature. How much energy is supplied by the heater? A 6.0 × 103 J B 1.0 × 104 J C 1.2 × 105 J D 7.2 × 106 J

1 marks

Answer: D

This question in 0625/21 May/June 2018

11 The work done W by a force is related to the magnitude F of the force and the distance d moved in the direction of the force. Which equation for W is correct? A W = d ÷ F B W = d + F C W = F ÷ d D W = F × d

1 marks

Answer: D

This question in 0625/22 May/June 2018

12 A crane on a construction site lifts concrete beams. The useful work done by the crane is 4000 kJ in a time of 160 s. What is the useful output power of the crane? A 0.04 kW B 25 W C 25 kW D 640 kW

1 marks

Answer: C

This question in 0625/22 May/June 2018

10 An aircraft with a mass of 300 000 kg is flying at an altitude of 2000 m with a speed of 100 m / s. What is the kinetic energy of the aircraft? A 1.5 × 104 kJ B 1.5 × 106 kJ C 3.0 × 106 kJ D 6.0 × 106 kJ

1 marks

Answer: B

This question in 0625/23 May/June 2018

11 Which method of drying clothes has the least impact on the environment? A Evaporate the water in them in an electrically heated tumble dryer. B Hang them on a washing line in direct sunlight. C Remove the water from them in an electric spin dryer. D Suspend them close to a coal fire.

1 marks

Answer: B

This question in 0625/23 May/June 2018

12 The vertical displacement of a mass of 0.20 kg changes with time. The graph shows how this displacement changes. 3 displacement / cm 2 1 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 time / s –1 –2 –3 At which rate does it gain gravitational potential energy as it moves upwards? A 0.025 W B 0.050 W C 0.20 W D 0.40 W

1 marks

Answer: D

This question in 0625/23 May/June 2018

9 Which device is designed to convert chemical energy into kinetic energy? A an a.c. generator B a battery-powered torch C a car engine D a wind-up mechanical clock

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2018

10 An object, initially at rest, is dropped from a height of 12.0 m. The change in gravitational potential energy when it falls to the ground is 565 J. The frictional forces are negligible. What is its speed when it hits the ground? A 4.71 m / s B 15.5 m / s C 47.1 m / s D 240 m / s

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2018

11 A man climbs a ladder. Which two quantities can be used to calculate the useful power of the man? A the weight of the man and the time taken only B the weight of the man and the vertical distance moved only C the work done by the man and the time taken only D the work done by the man and the vertical distance moved only

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2018

9 Which device is designed to convert chemical energy into kinetic energy? A an a.c. generator B a battery-powered torch C a car engine D a wind-up mechanical clock

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2018

10 The diagram shows a pendulum. P R 10 cm Q The pendulum swings from P to Q to R and back to P. P is 10 cm higher than Q. At which speed does the pendulum bob pass through Q? A 0.44 m / s B 1.0 m / s C 1.4 m / s D 2.0 m / s

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2018

11 A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0 m from the ground, they have a speed of 5.0 m / s. How much work is done during this process? A 2.5 kJ B 10.0 kJ C 12.5 kJ D 35 kJ

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2018

20 A lamp has a metal filament that glows when heated by an electric current. The middle of the filament is at a very high temperature. The ends of the filament, which are connected to the base of the lamp, are cooler. Which statement is correct? A Some thermal energy is conducted to the base of the lamp. B The filament radiates energy equally at all points along its length. C The lamp transfers all of the electrical energy it receives into light energy. D When the voltage across the filament is halved, the power output is halved.

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2018

8 An electron is moving at a speed of 5 × 106 m / s. A neutron is moving at a speed of 5 × 104 m / s. The mass of the electron is m. The mass of the neutron is 2000m. Which row is correct? greater greater momentum kinetic energy A electron electron B electron neutron C neutron electron D neutron neutron

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2018

9 Which device is designed to convert chemical energy into kinetic energy? A an a.c. generator B a battery-powered torch C a car engine D a wind-up mechanical clock

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2018

10 A barrel of mass 40 kg is raised to a height of 1.5 m by rolling it up a ramp. The length of the ramp is 8.0 m. The force F applied to the barrel acts parallel to the ramp. The frictional force is negligible. 8.0 m F 40 kg 1.5 m Which row is correct? gain in gravitational force F / N potential energy / J A 60 7.5 B 60 40 C 600 75 D 600 400

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2018

11 What is the main process by which energy is produced in the Sun? A combustion B nuclear fission C nuclear fusion D radioactive decay

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2018

18 The temperature of the water at the bottom of a waterfall is greater than the temperature of the water at the top. The gravitational potential energy of the water at the top is transferred to thermal energy at the bottom. The specific heat capacity of water is 4200 J / (kg °C). What is the temperature difference for a waterfall of height 21 m? A 0.005 °C B 0.05 °C C 20 °C D 200 °C

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2018

4 The gravitational field strength on the Moon is less than on the Earth. Which of these is different when done on the Moon compared with when done on the Earth? A the gravitational potential energy gained by a stone lifted through the same vertical height B the kinetic energy gained by a ball when hit with the same force for the same period of time C the momentum gained by a bullet when fired from the same gun D the work done in accelerating a stone from rest to the same speed

1 marks

Answer: A

This question in 0625/22 Feb/March 2019

11 A car of mass 1500 kg has a speed of 20 m / s. It accelerates until its speed is 25 m / s. What is the increase in the kinetic energy of the car? A 19 kJ B 38 kJ C 170 kJ D 340 kJ

1 marks

Answer: C

This question in 0625/22 Feb/March 2019

12 Which source of energy uses the production of steam to generate electrical energy? A hydroelectric B nuclear C tides D waves

1 marks

Answer: B

This question in 0625/22 Feb/March 2019

13 A car, travelling on a straight horizontal road, has 1.6 MJ of kinetic energy. It accelerates for 20 s until it has 2.5 MJ of kinetic energy. What is the average power output used to increase the kinetic energy of the car? A 45 W B 205 W C 45 kW D 205 kW

1 marks

Answer: C

This question in 0625/22 Feb/March 2019

30 Which electrical quantity is defined in terms of the energy supplied in driving charge round a complete circuit? A current B electromotive force C potential difference D power

1 marks

Answer: B

This question in 0625/22 Feb/March 2019

10 An object falls from the top of a building that is 25 m high. Air resistance is negligible. What is the speed of the object when it hits the ground? A 10 m / s B 22 m / s C 25 m / s D 625 m / s

1 marks

Answer: B

This question in 0625/21 May/June 2019

11 A machine is very efficient. What does this mean? A It produces a large amount of power. B It uses very little energy. C It wastes very little energy. D It works very quickly.

1 marks

Answer: C

This question in 0625/21 May/June 2019

12 A crane takes 2.0 minutes to lift a load to the top of a building. The change in gravitational potential energy of the load is 360 kJ. What is the useful power output of the crane? A 3.0 kW B 180 kW C 720 kW D 43 200 kW

1 marks

Answer: A

This question in 0625/21 May/June 2019

28 A cell has an electromotive force (e.m.f.) of 1.5 V. What does this statement mean? A The cell converts 1.0 J of energy when driving 1.5 C of charge round a complete circuit. B The cell converts 1.5 J of energy when driving 1.0 C of charge round a complete circuit. C The cell converts 1.5 J of energy per second when driving 1.0 C of charge round a complete circuit. D The cell converts 1.5 W of power when driving 1.0 C of charge round a complete circuit.

1 marks

Answer: B

This question in 0625/21 May/June 2019

10 A machine is very efficient. What does this mean? A It produces a large amount of power. B It uses very little energy. C It wastes very little energy. D It works very quickly.

1 marks

Answer: C

This question in 0625/22 May/June 2019

11 A force F acts on a body and the body moves a distance d in the direction of the force. Which expression for the work done W is correct? A W = Fd B W = Fd 2 C W = 2 1 Fd D W = 2 1 Fd 2

1 marks

Answer: A

This question in 0625/22 May/June 2019

12 A boy produces an average power output of 60 W as he rides his bicycle for 2.0 minutes. How much useful energy does he expend? A 0.50 J B 30 J C 120 J D 7200 J

1 marks

Answer: D

This question in 0625/22 May/June 2019

10 An object is in free fall. The change in gravitational potential energy of the body depends upon its mass m, the change in height ∆h and the gravitational field strength g. What is the correct expression for the change in gravitational potential energy? gm g∆ h m∆ h A gm∆h B C D ∆ h m g

1 marks

Answer: A

This question in 0625/23 May/June 2019

11 A machine is very efficient. What does this mean? A It produces a large amount of power. B It uses very little energy. C It wastes very little energy. D It works very quickly.

1 marks

Answer: C

This question in 0625/23 May/June 2019

12 A box is pulled along a floor by a force of 3.0 N. The friction acting on the box is 1.0 N, as shown. box 1.0 N 3.0 N How much kinetic energy does the box gain in moving 2.0 m? A 2.0 J B 4.0 J C 6.0 J D 8.0 J

1 marks

Answer: B

This question in 0625/23 May/June 2019

15 A night storage heater contains a large block of material that is heated electrically during the night. During the day the block cools down, releasing thermal energy into the room. Which thermal capacity and which night-time temperature increase will cause the most energy to be stored by the block? thermal capacity night-time of block temperature increase A large large B large small C small large D small small

1 marks

Answer: A

This question in 0625/23 May/June 2019

16 100 g of water at 25 °C is poured into an insulating cup. 50 g of ice at 0 °C is added to the water. The water is stirred until the temperature of the water has fallen to 0 °C. 18 g of ice remains unmelted. The specific heat capacity of water is 4.2 J / g °C. Which value does this experiment give for the specific latent heat of fusion of ice? A 210 J / g B 330 J / g C 580 J / g D 770 J / g

1 marks

Answer: B

This question in 0625/23 May/June 2019

28 A cell has an electromotive force (e.m.f.) of 1.5 V. What does this statement mean? A The cell converts 1.0 J of energy when driving 1.5 C of charge round a complete circuit. B The cell converts 1.5 J of energy when driving 1.0 C of charge round a complete circuit. C The cell converts 1.5 J of energy per second when driving 1.0 C of charge round a complete circuit. D The cell converts 1.5 W of power when driving 1.0 C of charge round a complete circuit.

1 marks

Answer: B

This question in 0625/23 May/June 2019

10 Brakes are used to slow down a moving car. Into which form of energy is most of the kinetic energy converted as the car slows down? A chemical B elastic C thermal D sound

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2019

11 A man carries 20 tiles from the ground to the roof of a house. Each tile has a mass of 1.2 kg. The roof of the house is 15 m above the ground. How much work does the man do against gravity on the tiles in carrying them to the roof? A 36 J B 180 J C 360 J D 3600 J

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2019

12 A car is moving along a straight horizontal road. The car has 1.6 MJ of kinetic energy. The car accelerates for 20 s until the kinetic energy of the car increases to 2.5 MJ. What is the minimum average power developed by the car engine for this acceleration? A 45 W B 205 W C 45 kW D 205 kW

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2019

11 Brakes are used to slow down a moving car. Into which form of energy is most of the kinetic energy converted as the car slows down? A chemical B elastic C thermal D sound

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2019

12 A box of mass 8.0 kg is lifted from the ground and placed on a shelf. The box gains 100 J of potential energy. The box falls off the shelf. Air resistance can be ignored. At what speed does the box hit the ground? A 3.5 m / s B 5.0 m / s C 25 m / s D 28 m / s

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2019

13 A car is moving along a straight horizontal road. The car has 1.6 MJ of kinetic energy. The car accelerates for 20 s until the kinetic energy of the car increases to 2.5 MJ. What is the minimum average power developed by the car engine for this acceleration? A 45 W B 205 W C 45 kW D 205 kW

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2019

11 Brakes are used to slow down a moving car. Into which form of energy is most of the kinetic energy converted as the car slows down? A chemical B elastic C thermal D sound

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2019

12 A force of 25 N acts on an object. The work done by the force is 400 J. How far does the object move in the direction of the force? A 6.3 cm B 16 cm C 16 m D 10 km

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2019

13 A car is moving along a straight horizontal road. The car has 1.6 MJ of kinetic energy. The car accelerates for 20 s until the kinetic energy of the car increases to 2.5 MJ. What is the minimum average power developed by the car engine for this acceleration? A 45 W B 205 W C 45 kW D 205 kW

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2019

11 Which row describes an advantage and a disadvantage of wind turbines? advantage disadvantage A no fuel needed harmful gases released B variable supply fuel needed C no harmful gases released variable supply D constant supply noisy

1 marks

Answer: C

This question in 0625/22 Feb/March 2020

12 An electric motor provides 900 J of useful output energy. The efficiency of the motor is 60 %. How much electrical energy is supplied to the motor? A 15 J B 540 J C 1500 J D 5400 J

1 marks

Answer: C

This question in 0625/22 Feb/March 2020

13 A crane takes 2.0 minutes to lift a 500 kg load to the top of a building that is 12 m high. What is the useful power developed against gravity by the crane? A 21 W B 50 W C 500 W D 30 000 W

1 marks

Answer: C

This question in 0625/22 Feb/March 2020

10 The diagram shows part of a rollercoaster ride with the car at different positions. The car runs freely down from position X to position Y and up the hill on the other side. car X Y What happens to the kinetic energy and to the gravitational potential energy of the car as it moves from position X to position Y? gravitational kinetic energy potential energy A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 0625/21 May/June 2020

11 Which energy resource does not have the Sun as the original source? A coal B geothermal C hydroelectric D wind

1 marks

Answer: B

This question in 0625/21 May/June 2020

10 Which energy resource is not renewable? A geothermal B nuclear fission C solar D wind

1 marks

Answer: B

This question in 0625/22 May/June 2020

11 A car of mass 500 kg is moving at 10 m / s. The engine does work on the car and the speed increases to 16 m / s. How much work is done by the engine to increase the speed of the car? A 3000 J B 9000 J C 39 000 J D 78 000 J

1 marks

Answer: C

This question in 0625/22 May/June 2020

10 A mass bounces up and down on a steel spring. The diagram shows the mass and the spring at different points during the motion. mass mass highest moving moving point down up lowest point At which point does the mass have the least gravitational potential energy and at which point is the most elastic energy stored in the spring? least amount of most elastic energy gravitational stored in spring potential energy A mass moving down mass moving up B mass moving down lowest point C lowest point mass moving up D lowest point lowest point

1 marks

Answer: D

This question in 0625/23 May/June 2020

11 The velocity v of an object increases as it falls towards the ground. Which quantity is directly proportional to v2? A the speed of the object B the gravitational potential energy of the object C the kinetic energy of the object D the momentum of the object

1 marks

Answer: C

This question in 0625/23 May/June 2020

11 An electric motor uses 1000 J of electrical energy. It provides 450 J of useful output energy. What is the efficiency of the motor? A 4.5% B 5.5% C 45% D 55%

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2020

12 To calculate the power produced by a force, the size of the force must be known. What else needs to be known to calculate the power? the distance that the force moves the object the time for which the force acts on the object 0 0O WwW D> v v x x v x v x key Jv = needed X = not needed

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2020

15 A student splashes water on to her face. Here are three statements about the effects. P The water uses energy to evaporate. Q The water gains energy from the student. R The face of the student cools. Which statements are correct? A P and Q only B P and R only C Q and R only D P, Q and R

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2020

10 A woman of mass 50 kg has 81 J of kinetic energy. What is her speed? A 1.3 m / s B 1.6 m / s C 1.8 m / s D 3.2 m / s

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2020

11 What is the source of the Sun’s energy? A chemical reactions in the Sun’s core B -emissions in the Sun’s core C nuclear fission in the Sun’s core D nuclear fusion in the Sun’s core

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2020

12 To calculate the power produced by a force, the size of the force must be known. What else needs to be known to calculate the power? the distance that the force the time for which the moves the object force acts on the object 0 OW D> «x KM & «x \ x key Jv = needed X = not needed

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2020

10 An object of mass 4.5 kg is travelling at 7.0 m / s. How much kinetic energy does the object have? A 16 J B 32 J C 110 J D 220 J

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2020

11 A number of ways in which we use energy are listed. In which is the ultimate source of energy not the Sun? A Energy is provided by a horse to pull a cart. B Energy is provided by hydroelectric generators to heat a house. C Energy is provided by a nuclear power station. D Energy is provided by a windmill to pump water to a fountain.

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2020

12 To calculate the power produced by a force, the size of the force must be known. What else needs to be known to calculate the power? the distance that the force moves the object the time for which the force acts on the object 0 0O WwW D> v v x x v x v x key Jv = needed X = not needed

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2020

30 Electromotive force (e.m.f.) is defined in terms of the energy supplied in driving which physical quantity around a complete circuit? A charge B current C potential difference (p.d.) D power

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2020

9 A gas molecule strikes the wall of a container. The molecule rebounds with the same speed. wall wall gas molecule gas molecule before hitting the wall after hitting the wall What happens to the kinetic energy and what happens to the momentum of the molecule? kinetic energy momentum A changes changes B changes stays the same C stays the same changes D stays the same stays the same

1 marks

Answer: C

This question in 0625/22 Feb/March 2021

10 A horizontal force pulls a box along a horizontal surface. The box gains 30 J of kinetic energy and 10 J of thermal energy is produced by the friction between the box and the surface. How much work is done by the force? A 10 J B 20 J C 30 J D 40 J

1 marks

Answer: D

This question in 0625/22 Feb/March 2021

11 A crane is used to lift loads vertically. The output power of the crane to lift a car is P. The crane then lifts a lorry, which has 3.0 times the weight of the car, through 0.25 of the distance in 0.50 of the time. What is the output power of the crane now? A 3 P B 3 P C 8 P D 6P 8 2 3

1 marks

Answer: B

This question in 0625/22 Feb/March 2021

9 This question is about four methods used to produce electrical energy. Which method has a correct description? energy source emits method is renewable carbon dioxide A a hydroelectric power station yes no B a coal-fired power station no no C a wind turbine no yes D a nuclear power station yes yes

1 marks

Answer: A

This question in 0625/22 May/June 2021

10 A stone is released from rest from a high building on Earth. Air resistance is negligible. What is its velocity when it has fallen 5 m? A 7.1 m / s B 10 m / s C 50 m / s D 100 m / s

1 marks

Answer: B

This question in 0625/22 May/June 2021

11 The power input to an electric motor is 400 W. The efficiency of the motor is 85%. How much power is wasted? A 60 W B 85 W C 340 W D 470 W

1 marks

Answer: A

This question in 0625/22 May/June 2021

8 Electrical energy may be obtained from nuclear fission. In which order is the energy transferred in this process? A nuclear fuel  generator  reactor and boiler  turbines B nuclear fuel  generator  turbines  reactor and boiler C nuclear fuel  reactor and boiler  generator  turbines D nuclear fuel  reactor and boiler  turbines  generator

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2021

9 A motor of power P exerts a force F on an object. The object moves a distance d during the time t that the force acts. Which equation is used to calculate the time t ? F Fd Pd P A t = Pd B t = P C t = F D t = Fd

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2021

10 A scientist uses an electric motor to lift a load through a vertical distance of 2.0 m. He then increases the input power to the motor and repeats the experiment. The efficiency of the motor does not change. Which row correctly describes the effect that this has on the useful work done lifting the load and the time taken to lift it? work done time taken A decreases decreases B stays the same decreases C decreases stays the same D stays the same stays the same

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2021

8 Electrical energy may be obtained from nuclear fission. In which order is the energy transferred in this process? A nuclear fuel  generator  reactor and boiler  turbines B nuclear fuel  generator  turbines  reactor and boiler C nuclear fuel  reactor and boiler  generator  turbines D nuclear fuel  reactor and boiler  turbines  generator

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2021

9 A box of mass m slides down a slope of length l against a frictional force F. It descends a vertical height d. direction of motion F l mass m d stop As the box slides down the slope, it loses gravitational potential energy and it does work against the friction. Which row gives the loss in gravitational potential energy and the work done against friction? loss in gravitational work done potential energy against friction A mgd Fl B mgd Fd C mgl Fl D mgl Fd

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2021

10 A rope, connected to a pulley system and motor, is used to lift different objects through different distances. The time taken to lift each object is the same. The diagrams are not to scale. Which motor requires the greatest power? A B platform platform motor motor 2 m 3 m 10 kg 5 kg C D platform platform motor motor 1 m 3 m 10 kg 2 kg

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2021

8 Electrical energy may be obtained from nuclear fission. In which order is the energy transferred in this process? A nuclear fuel  generator  reactor and boiler  turbines B nuclear fuel  generator  turbines  reactor and boiler C nuclear fuel  reactor and boiler  generator  turbines D nuclear fuel  reactor and boiler  turbines  generator

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2021

9 Which energy resource has the Sun as its only source of energy? A geothermal B nuclear C oil D tidal

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2021

10 A man, attached to an elastic cord, jumps from a platform. He falls 60 m before starting to rise. The length of the unextended cord is 30 m. The diagrams show four successive stages in his fall. In which position is elastic (strain) energy and kinetic energy present? A B C D 30 m 45 m 60 m

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2021

14 An aluminium block has a mass of 200 g. The specific heat capacity of aluminium is 900 J / (kg C). How much energy is needed to increase the temperature of the block from 20 C to 110 C? A 2.0 J B 2000 J C 16 200 J D 16 200 000 J

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2021

11 A child pushes a toy car along a horizontal surface and then releases it. As the car slows down, what is the main energy transfer? A from chemical to thermal B from chemical to kinetic C from kinetic to gravitational (potential) D from kinetic to thermal

1 marks

Answer: D

This question in 0625/22 Feb/March 2022

12 At time = 0, a cannonball is stationary inside a cannon. The cannonball is then fired from the cannon. At time = t, the cannonball moves forwards and the cannon moves backwards. What happens to the total kinetic energy and the total momentum of the cannon and the cannonball between time = 0 and time = t ? total kinetic energy of total momentum of cannon and cannonball cannon and cannonball A changes changes B changes remains the same C remains the same changes D remains the same remains the same

1 marks

Answer: B

This question in 0625/22 Feb/March 2022

13 In a small hydroelectric power scheme, 800 kg of water drops through a vertical height of 2.2 m every second. The electrical output is 10.6 kW. What is the efficiency of the scheme? A 0.60% B 17% C 60% D 75%

1 marks

Answer: C

This question in 0625/22 Feb/March 2022

28 Two separate circuits have different power supplies. Both power supplies provide the same magnitude current. Power supply P has an electromotive force (e.m.f.) of 1.5 V and power supply Q has an e.m.f. of 3.0 V. Which statements about Q are correct when compared with P? 1 Q supplies twice the charge per unit time. 2 Q supplies twice the energy per unit charge. 3 Q supplies twice the energy per unit time. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: D

This question in 0625/22 Feb/March 2022

39 Nuclear fusion is a reaction that takes place in stars. Which row describes this reaction? action of atomic nuclei energy A an atomic nucleus splits into absorbed two or more smaller nuclei B an atomic nucleus splits into released two or more smaller nuclei C atomic nuclei join together absorbed to form a larger nucleus D atomic nuclei join together released to form a larger nucleus

1 marks

Answer: D

This question in 0625/22 Feb/March 2022

11 A mass hangs vertically from a spring. The mass is raised to a point P and is then released. The mass oscillates repeatedly between point P and a lower point Q. Which energies alternately increase and decrease throughout the oscillations? A gravitational potential energy, kinetic energy and elastic energy B gravitational potential energy and kinetic energy only C gravitational potential energy, kinetic energy and internal energy D internal energy and elastic energy

1 marks

Answer: A

This question in 0625/21 May/June 2022

12 A car has 620 kJ of kinetic energy. The car brakes and stops in a distance of 91 m. What is the average braking force acting on the car? A 0.15 N B 6.8 N C 6800 N D 56 000 N

1 marks

Answer: C

This question in 0625/21 May/June 2022

17 Water in a beaker gains thermal energy at a rate of 3000 W. The water is at its boiling point. The specific latent heat of vaporisation of water is 2260 J / g. How long does it take for 250 g of the water to vaporise? A 12 s B 188 s C 332 s D 750 s

1 marks

Answer: B

This question in 0625/21 May/June 2022

31 A resistor converts 360 J of energy when there is a current of 3.0 A in it. The potential difference across the resistor is 6.0 V. For how long is there this current in the resistor? A 0.05 s B 20 s C 180 s D 720 s

1 marks

Answer: B

This question in 0625/21 May/June 2022

11 A tennis ball is dropped from position 1. It falls vertically onto a hard surface at position 2. tennis ball position 1 position 2 Which energy changes have taken place between position 1 and position 2? A gravitational potential → kinetic → chemical B gravitational potential → kinetic → elastic (strain) C kinetic → gravitational potential → chemical D kinetic → gravitational potential → elastic (strain)

1 marks

Answer: B

This question in 0625/22 May/June 2022

12 A boy holds onto a bar and pulls himself up until his chin is level with the bar. He raises himself through 40 cm in 0.5 s. The weight of the boy is 500 N. What is the average power he produces as he raises himself? A 40 W B 400 W C 4000 W D 40 000 W

1 marks

Answer: B

This question in 0625/22 May/June 2022

17 A block of lead of mass 500 g is at its melting point. The specific latent heat of fusion of lead = 23 kJ / kg. How much energy is required to completely melt the block? A 46 J B 12 000 J C 46 000 J D 12 000 000 J

1 marks

Answer: B

This question in 0625/22 May/June 2022

11 In which form is energy stored by stretching a spring? A chemical energy B elastic potential energy C gravitational potential energy D thermal energy

1 marks

Answer: B

This question in 0625/23 May/June 2022

12 A car moves along a horizontal road. Its initial kinetic energy is 280 kJ. A constant resistive force of 200 N acts on the car. No other horizontal forces act on the car. What is the kinetic energy of the car after it has travelled a distance of 300 m? A 60 kJ B 80 kJ C 220 kJ D 340 kJ

1 marks

Answer: C

This question in 0625/23 May/June 2022

31 There is a current I in a resistor for a time t. The potential difference (p.d.) across the resistor is V. A student calculates the product IVt. In which unit is the student’s answer measured? A ampere B coulomb C joule D watt

1 marks

Answer: C

This question in 0625/23 May/June 2022

8 Brakes are used to slow down a moving car. Into which form of energy is most of the kinetic energy converted as the car slows down? A chemical B elastic C thermal D sound

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2022

9 An object has kinetic energy of 200 J. A constant resultant force of 190 N is applied in the direction of its motion through a distance of 10 m. What is the final kinetic energy of the object? A 390 J B 1700 J C 2000 J D 2100 J

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2022

10 The statements describe what happens when the power of a machine is increased. 1 The work done in a given time decreases. 2 The work done in a given time increases. 3 The time taken to do a given quantity of work decreases. 4 The time taken to do a given quantity of work increases. Which statements are correct? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2022

29 A lamp rated 12 V, 2.0 A is switched on for one minute. How much energy is transferred by the lamp? A 6.0 J B 24 J C 360 J D 1440 J

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2022

8 An object falls towards the Earth’s surface. What happens to the gravitational potential energy and to the kinetic energy of the object? gravitational potential kinetic energy energy A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2022

9 A boy takes 0.60 s to lift a book of mass 0.60 kg from the top of a desk and place it on a shelf. The top of the desk is 0.80 m above the floor, and the shelf is 1.7 m above the floor. The gravitational field strength is 10 N / kg. shelf top of desk 1.7 m 0.8 m Which power does the boy develop? A 0.9 W B 1.7 W C 9.0 W D 17 W

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2022

10 A mass is lifted from rest on the ground to Y. There is no air resistance. Y P is the increase in gravitational energy of the mass. Q is the kinetic energy of the mass at Y. Which expression is equal to the mechanical work done on the mass? A P + Q B P – Q C Q – P D P × Q

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2022

8 An object falls towards the Earth’s surface. What happens to the gravitational potential energy and to the kinetic energy of the object? gravitational potential kinetic energy energy A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2022

9 A skier is pulled up a short straight slope at constant speed by a rope. rope The tension in the rope is 100 N and there is a combined frictional and air resistance force of 20 N acting on the skier. The slope is 10 m long and the skier rises 1.5 m vertically. How much work is done by the rope pulling the skier up the slope? A 120 J B 150 J C 1000 J D 1200 J

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2022

10 In some situations, a force does work. Which set of conditions increases the quantity of work done by the force? magnitude distance moved of force by the force A decreases decreases B decreases stays the same C increases increases D stays the same decreases

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2022

15 An ice cube of mass 12 g at 0 C absorbs thermal energy from the surroundings at a rate of 3 J / s. The specific latent heat of fusion of ice is 330 J / g. How long will it take for the ice cube to melt? A 82.5 s B 1320 s C 3960 s D 11 880 s

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2022

10 The equation used to find the change in gravitational potential energy of an object can be written as ∆EP = Y × Z × ∆h where ∆EP is the change in gravitational energy and ∆h is the change in height. Which row gives the quantities Y and Z? Y Z A mass gravitational field strength B gravitational field strength density C density speed D speed mass

1 marks

Answer: A

This question in 0625/22 Feb/March 2023

11 A machine has a power input of 200 W and a useful output energy of 1 kJ in 6 minutes. What is the efficiency of the machine? A 0.014% B 0.83% C 1.4% D 83%

1 marks

Answer: C

This question in 0625/22 Feb/March 2023

12 What is the unit of power? A joule B newton C volt D watt

1 marks

Answer: D

This question in 0625/22 Feb/March 2023

10 Which row about the change of energy in the energy store must be correct? change of process energy store energy in store A water pumped up to a gravitational potential increases high-altitude dam energy of water B water pumped up to a kinetic energy decreases high-altitude dam of water C air passes through gravitational potential increases a wind turbine energy of air D air passes through kinetic energy increases a wind turbine of air

1 marks

Answer: A

This question in 0625/21 May/June 2023

11 A woman of mass 50 kg has 81 J of kinetic energy. What is her speed? A 1.3 m / s B 1.6 m / s C 1.8 m / s D 3.2 m / s

1 marks

Answer: C

This question in 0625/21 May/June 2023

12 A child runs up a set of stairs four times. The time taken for each run is recorded. Which time is measured when the child’s useful power is greatest? A 10 s B 20 s C 30 s D 40 s

1 marks

Answer: A

This question in 0625/21 May/June 2023

10 The diagram shows the energy stores for a mobile (cell) phone and how the energy is transferred between stores. internal heating energy chemical ? energy kinetic sound energy What describes how the chemical energy is transferred? A electrical work done B mechanical work done C electromagnetic waves D sound waves

1 marks

Answer: A

This question in 0625/22 May/June 2023

11 A wind turbine is 30% efficient and has an output of 2.5 MW of electrical power. What is the power input to the turbine? A 0.75 MW B 8.3 MW C 75 MW D 83 MW

1 marks

Answer: B

This question in 0625/22 May/June 2023

12 Which two physical quantities must be used to calculate the power developed by a student running up a flight of steps? A force exerted and the vertical height of the steps only B force exerted and the time taken only C work done and the vertical height of the steps only D work done and the time taken only

1 marks

Answer: D

This question in 0625/22 May/June 2023

33 Fission and fusion are two types of nuclear process. How does the total mass of the nuclides produced compare with the total mass of the original nuclide or nuclides in these nuclear processes? total mass of fission total mass of fusion products compared products compared to original nuclide to original nuclides A same same B more less C less more D less less

1 marks

Answer: D

This question in 0625/22 May/June 2023

10 A bicycle braking system transfers energy from a kinetic energy store to an internal energy store. A motor converts energy from a chemical energy store (battery) to a kinetic energy store. What enables these energy transfers? braking system motor A electrical work mechanical work B electrical work electrical work C mechanical work mechanical work D mechanical work electrical work

1 marks

Answer: D

This question in 0625/23 May/June 2023

12 The engine of a motor vehicle develops a large power. Which statement is correct? A The driving force acting on the vehicle must be large. B The engine must have a very large volume. C The engine must transfer large amounts of energy each second. D The vehicle must be very fast.

1 marks

Answer: C

This question in 0625/23 May/June 2023

8 A cyclist travels down a hill from rest at point X without pedalling. The cyclist applies his brakes and the cycle stops at point Y. X hill Y Which energy transfers have taken place between X and Y? A gravitational potential  kinetic  internal (thermal) B gravitational potential  internal (thermal)  kinetic C kinetic  gravitational potential  internal (thermal) D kinetic  internal (thermal)  gravitational potential

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2023

9 An object of mass m falls from a higher shelf to a lower shelf. h1 h2 How much gravitational potential energy does the object lose?  m h2   m (h1 – h2)  A mgh2 B   C   D mg(h1 – h2)  g   g 

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2023

10 A pump does 460 000 J of work to raise water to fill a tank. It takes 7 minutes to fill the tank. What is the power of the pump? A 1.1 kW B 66 kW C 3200 kW D 190 000 kW

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2023

8 The diagram shows part of a rollercoaster ride with the car at different positions. The car runs freely down from position X to position Y and up the hill on the other side. car X Y What happens to the energy in the kinetic store and the gravitational potential store of the car as it moves from position X to position Y? energy in energy in gravitational kinetic store potential store A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2023

9 A box is initially at rest at the top of a rough slope. The box slides down the slope. The weight of the box is 20 N. The slope is 4.0 m long and 2.0 m high. 4.0 m 2.0 m The box does 10 J of work against friction as it slides down the slope. What is the speed of the box as it reaches the bottom of the slope? A 5.4 m / s B 6.3 m / s C 7.1 m / s D 9.5 m / s

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2023

10 An electric car is charged overnight. In 8.0 hours, 180 MJ of energy is transferred. What is the power of the charger? A 6.3 kW B 380 kW C 23 MW D 1400 MW

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2023

4 The mass of air hitting the blades of a wind turbine each second is 1.5 × 104 kg. The speed of the air is 4.0 m / s. The density of air is 1.2 kg / m3. Which row gives the volume of the air hitting the blades each second and the kinetic energy of the air hitting the blades each second? volume of air kinetic energy each second / m3 each second / J A 13 000 72 000 B 13 000 120 000 C 18 000 72 000 D 18 000 120 000

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2023

8 A mass bounces up and down on a steel spring. The diagram shows the mass and the spring at different points during the motion. mass mass highest moving moving point down up lowest point At which point is the least energy in the gravitational potential store of the mass and at which point is the most energy in the elastic store of the spring? least energy in most energy in gravitational potential the elastic store store of the mass of the spring A mass moving down mass moving up B mass moving down lowest point C lowest point mass moving up D lowest point lowest point

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2023

9 A boy uses a rope to pull an object of mass m up a slope. The rope is parallel to the slope. The tension in the rope is constant and of value F. The object moves a distance d along the slope and rises through a height h. How much work is done by the boy? A F × d B F × h C m × g × h × d D m × g × h2

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2023

10 A microwave oven is rated at 900 watts. Which statement correctly describes the meaning of this value? A 900 joules are transferred every second. B 900 amperes are transferred every second. C 900 volts are transferred every second. D 900 ohms are transferred every second.

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2023

14 A student splashes water on to her face. Here are three statements about the effects. P The water uses energy to evaporate. Q The water gains energy from the student. R The face of the student cools. Which statements are correct? A P and Q only B P and R only C Q and R only D P, Q and R

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2023

3 A ball is falling towards the ground. Which transfer between energy stores is taking place? A elastic energy to kinetic energy B gravitational potential energy to elastic energy C gravitational potential energy to kinetic energy D kinetic energy to gravitational potential energy

1 marks

Answer: C

This question in 0625/22 Feb/March 2024

15 The diagram shows the equipment used in an experiment on the heating of aluminium. to power V A thermometer supply insulated heater aluminium block The table gives the results for the experiment. mass of block 0.80 kg voltmeter reading 12 V ammeter reading 5.0 A time 300 s The specific heat capacity of aluminium is 900 J / (kg C). What is the maximum possible temperature rise in the block? A 9 C B 20 C C 25 C D 225 C

1 marks

Answer: C

This question in 0625/22 Feb/March 2024

38 The diagram shows a comet moving in an elliptical orbit around the Sun. At which position is the comet moving with the greatest speed? C comet A Sun D B

1 marks

Answer: A

This question in 0625/22 Feb/March 2024

7 A stone is dropped from a tall tower and falls a distance of 50 m to the ground. The stone has a mass of 3.0 kg. At which speed does the stone hit the ground? A 17 m / s B 31 m / s C 54 m / s D 150 m / s

1 marks

Answer: B

This question in 0625/21 May/June 2024

8 A coal-fired power station generates electricity. Coal is burned and the energy released is used to boil water. The steam from the water makes the generator move and this produces electricity. Which row gives the name of the energy store in the coal and the energy store of the moving generator? coal generator A chemical hydroelectric B chemical kinetic C geothermal hydroelectric D geothermal kinetic

1 marks

Answer: B

This question in 0625/21 May/June 2024

37 A planet in the Solar System is at the point in its orbit where it is closest to the Sun. Which row is correct? energy in gravitational orbital speed potential store A at its maximum at its maximum B at its maximum at its minimum C at its minimum at its maximum D at its minimum at its minimum

1 marks

Answer: B

This question in 0625/21 May/June 2024

7 The table gives four energy resources and states whether the main source of energy for the resource is the Sun. Which row is correct? main source of energy resource energy is the Sun A geothermal yes B oil no C water held behind a dam yes D wind no

1 marks

Answer: C

This question in 0625/22 May/June 2024

13 The temperature of the water at the bottom of a waterfall is greater than the temperature of the water at the top. The energy in the gravitational potential store of the water at the top is transferred to the thermal store at the bottom. The specific heat capacity of water is 4200 J / (kg C). What is the temperature difference for a waterfall of height 21 m? A 0.0050 C B 0.049 C C 20 C D 200 C

1 marks

Answer: B

This question in 0625/22 May/June 2024

27 A resistor transfers 100 J of energy when a charge of 10 C flows through it. What is the potential difference across the resistor? A 0.10 V B 10 V C 10 W D 1000 W

1 marks

Answer: B

This question in 0625/22 May/June 2024

8 Which statement about the use of nuclear fuel as an energy resource is correct? A It obtains its energy from the Sun. B It has no environmental impact. C Nuclear power stations do not need turbines. D The energy is released by nuclear fission.

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2024

9 The diagram shows an object of mass m being projected with speed v from a point P to a point Q on top of a cliff height h. The object does work W against air resistance as it travels from P to Q. Q v h m P What is the kinetic energy of the object when it reaches point Q? A 1 mv2 + mgh + W 2 B 1 mv2 + mgh – W 2 C 1 mv2 – mgh + W 2 D 1 mv2 – mgh – W 2

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2024

10 The diagram shows a Sankey diagram for an electric drill. kinetic energy energy input sound thermal energy scale: distance between two lines = 40 J What is the total wasted energy shown by the diagram? A 120 J B 200 J C 360 J D 560 J

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2024

8 Which row shows the process by which energy in the Sun is released, the process by which it is transferred to the Earth and a way in which it is stored once it reaches the Earth? process by which process by which the a method by which energy is released energy is transferred from the energy is stored in the Sun the Sun to the Earth on the Earth A fission convection biofuel B fusion radiation nuclear fuel C fusion convection nuclear fuel D fusion radiation biofuel

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2024

9 An object has a mass of 20 kg. It is taken up stairs through a height of 4.0 m. What is the increase in the store of gravitational potential energy? A 5.0 J B 49 J C 80 J D 780 J

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2024

10 An electrician uses a lifting machine, as shown. The lifting machine takes 4.5 s to lift the electrician a vertical height of 3.2 m. electrician 2.0 kW electric motor street light moveable platform 3.2 m lifting machine ground The mass of the electrician is 72 kg. The energy for the lifting machine is supplied by a 2.0 kW electric motor. What is the efficiency of the lifting machine? A 0.026 B 0.25 C 0.50 D 0.75

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2024

8 Useful energy is obtained from different energy resources. Four examples of energy resources are listed. ● water waves ● geothermal ● wind ● water behind hydroelectric dams How many of these energy resources depend on radiation from the Sun? A 1 B 2 C 3 D 4

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2024

9 A box of mass 2.0 kg slides down a slope. The gravitational field strength is 9.8 N / kg. box 13 m P 5 m Q 12 m What is the decrease in the gravitational potential energy stored as the box moves from P to Q? A 9.8 J B 98 J C 240 J D 250 J

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2024

10 The diagram shows the path of a long-jumper. Point R, where she lands, is on the same horizontal level as point P, from where she takes off. The long-jumper experiences air resistance as she runs and jumps. Q P R Which graph shows how the store of kinetic energy and the store of gravitational potential energy of the long-jumper vary with time between points P and R? A B energy energy key kinetic energy gravitational potential energy time time C D energy energy time time

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2024

9 A car is travelling at a speed of 8.0 m / s. The kinetic energy stored in the car is 32 000 J. What is the kinetic energy stored in the car when its speed increases to 16 m / s? A 16 000 J B 32 000 J C 64 000 J D 130 000 J

1 marks

Answer: D

This question in 0625/22 Feb/March 2025

10 The Sun is not the primary source of energy for which resource? A oil B tidal C wind D wave

1 marks

Answer: B

This question in 0625/22 Feb/March 2025

12 Four students determine the efficiency of four different electrical devices. The teacher knows that one student has made a mistake in the calculation. Which value for efficiency is not correct? A 12% B 36% C 78% D 102%

1 marks

Answer: D

This question in 0625/22 Feb/March 2025

8 A stone is thrown vertically upwards at a speed of 5.0 m / s. All of the energy initially in the kinetic store of the stone is transferred to its gravitational potential store when the stone reaches its maximum height. Which equation gives the maximum height h reached by the stone? 9.8 A h = 2  5.0 2 5.02  2 B h = 9.8 5.02 C h = 2  9.8 2  9.8 D h = 5.0 2

1 marks

Answer: C

This question in 0625/22 May/June 2025

9 Three energy resources are listed. 1 geothermal 2 wind 3 nuclear fuel Which resources get their energy from the Sun? A 1, 2 and 3 B 1 and 2 only C 1 only D 2 only

1 marks

Answer: D

This question in 0625/22 May/June 2025

14 The diagram shows the equipment used in an experiment to determine the specific heat capacity of a metal. In the experiment, a heater is switched on for t s and the increase in temperature  of a block of the metal is measured in °C. to power thermometer supply heater of insulated power P W metal block of mass m kg Which equation gives the specific heat capacity of the metal? P P t tm   m   A c = B c = C c = D c = tm   m   P P t

1 marks

Answer: B

This question in 0625/22 May/June 2025

33 The primary voltage supplied to a transformer is 3.0 V. The secondary voltage is 5.0 V and the secondary current is 2.0 A. The transformer is 100% efficient. What is the primary current in the transformer? A 1.2 A B 2.0 A C 3.3 A D 7.5 A

1 marks

Answer: C

This question in 0625/22 May/June 2025

9 A stone is dropped from a bridge which is 22 m above a river. What is the speed of the stone when it hits the water? A 15 m / s B 21 m / s C 220 m / s D 430 m / s

1 marks

Answer: B

This question in 0625/23 May/June 2025

14 The diagram shows some of the apparatus used to determine the specific heat capacity of a metal block. A thermometer metal block Which additional pieces of apparatus are required to find the specific heat capacity? A stop-watch, voltmeter and balance B resistor, stop-watch and ruler C ruler, balance and force meter D voltmeter, thermistor and insulation

1 marks

Answer: A

This question in 0625/23 May/June 2025

26 A circuit contains a cell with an electromotive force (e.m.f.) of 2.0 V. The current in the circuit is 2.0 A. How much energy is transferred by the cell in 2.0 minutes? A 2.0 J B 4.0 J C 8.0 J D 480 J

1 marks

Answer: D

This question in 0625/23 May/June 2025

33 A beta particle has less mass than an alpha particle, but the speed of a beta particle emitted during radioactive decay is approximately 20 times greater than the speed of an alpha particle. Which statement correctly compares properties of these two particles? A Alpha particles are less penetrating because they have less kinetic energy than beta particles. B Alpha particles are more penetrating because they have less kinetic energy than beta particles. C Alpha particles are less ionising because they have more kinetic energy than beta particles. D Alpha particles are more ionising because they have more kinetic energy than beta particles.

1 marks

Answer: D

This question in 0625/23 May/June 2025

8 A machine is very efficient. What does this mean? A It produces a large amount of power. B It uses very little energy. C It wastes very little energy. D It works very quickly.

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2025

27 A cell passes a current of 2.0 A in a circuit for 30 s. In this time, the cell transfers 120 J of energy. What is the electromotive force (e.m.f.) of the cell? A 0.50 V B 1.5 V C 2.0 V D 8.0 V

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2025

32 Cables transmit electrical power from the output of the transformer at a power station to the input of another transformer at a substation. cables output input transformer at transformer at power station substation The power at the output of the transformer at the power station is 400 MW. Which situation delivers the most power to the input of the transformer at the substation? potential difference at power station transformer diameter of cables output / kV A 200 large B 200 small C 400 large D 400 small

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2025

7 A mass is suspended from a vertical spring. The mass is pulled downwards causing the spring to extend further. The mass is held in this position and then released. Which energy changes occur during the initial movement of the mass when the mass is released? gravitational elastic kinetic potential energy potential energy energy store store store A decreases decreases increases B decreases increases increases C increases decreases decreases D increases increases decreases

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2025

8 Which energy resource stores kinetic energy? A coal B nuclear fission C solar D wind

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2025

9 Which device transfers energy from a chemical energy store to a kinetic energy store? A an a.c. generator B a battery-powered torch C a car engine D a wind-up mechanical clock

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2025

10 For which energy resource is the Sun the main source? A geothermal B nuclear C tidal D wind

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2025

17 Star X has a larger diameter than star Y but they both emit radiation with the same power. Which statement is correct? A The surface temperature of X is less than the surface temperature of Y. B The surface temperatures of X and Y are the same. C The surface temperature of X is greater than the surface temperature of Y. D The surface areas of X and Y are the same.

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2025

28 A torch has a simple circuit with a 3.0 V battery and a lamp. There is a 20 mA current in the lamp. How much energy is transferred to the lamp in 5.0 minutes? A 0.30 J B 18 J C 60 J D 0.30 kJ

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2025