Forces — Paper 2 · IGCSE Physics (9-1) 0972

2 When does an object falling vertically through the air reach terminal velocity? A when the acceleration of the object becomes negative B when the acceleration of the object is equal to g C when the air resistance equals the weight of the object D when the air resistance is greater than the weight of the object

1 marks

Answer: C

This question in 0972/21 May/June 2018

4 Diagram 1 shows a beam balance. A beaker with a wire loop balances the standard masses. The beaker is then removed and hung from a spring. The spring extends by 5.0 cm, as in diagram 2. diagram 1 diagram 2 beam beaker with spring standard balance wire loop masses attached beaker with wire loop attached The experiment is repeated with the same apparatus on the Moon, where the acceleration of free fall is less than on Earth. Which statement describes what happens on the Moon? A The beam balance is balanced and the spring extends by 5.0 cm. B The beam balance is balanced and the spring extends by less than 5.0 cm. C The right-hand balance pan is higher and the spring extends by 5.0 cm. D The right-hand balance pan is higher and the spring extends by less than 5.0 cm.

1 marks

Answer: B

This question in 0972/21 May/June 2018

6 A force acting on a moving ball causes its motion to change. This force stays constant. What makes the force produce a greater change in the motion of the ball? A decreasing the total mass of the ball B increasing the temperature of the ball C using a ball with a hollow centre but the same mass D using a different material for the ball so that it has a lower density but the same mass

1 marks

Answer: A

This question in 0972/21 May/June 2018

7 A balloon and a mass are attached to a rod that is pivoted at P. balloon 45 40 35 30 25 20 15 10 5 P cm mass The balloon is filled with helium, a gas less dense than air, so that it applies an upward force on the rod. The rod is horizontal and stationary. Which action causes the rod to rotate clockwise? A Move both the balloon and mass 10 cm to the left. B Move both the balloon and mass 10 cm to the right. C Move both the balloon and mass to the 25 cm mark. D Move the balloon to the 20 cm mark and the mass to the 30 cm mark.

1 marks

Answer: B

This question in 0972/21 May/June 2018

8 A car is moving in a straight line on a level road. Its engine provides a forward force on the car. A second force of equal size acts on the car due to resistive forces. Which statement describes what happens? A The car changes direction. B The car moves at a constant speed. C The car slows down. D The car speeds up.

1 marks

Answer: B

This question in 0972/21 May/June 2018

2 A small, light ball is dropped from the top of a tall building. Which graph shows how the speed of the ball changes with time? A B speed speed 0 0 0 time 0 time C D speed speed 0 0 0 time 0 time

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2018

4 A helium balloon is tied to a top-pan balance. A metal block of mass 100 g is placed on the balance. The reading on the balance is 91 g. helium balloon metal block 91 g Which statement can be deduced from this experiment? A The balloon exerts a downward force of 0.09 N on the top-pan balance. B The helium has a mass of –9 g. C The helium has a mass of +9 g. D The resultant downward force on the top-pan balance is 0.91 N.

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2018

6 A resultant force of 4.0 N acts on an object of mass 0.50 kg for 3.0 seconds. What is the change in velocity caused by this force? A 4.0 m / s B 6.0 m / s C 12 m / s D 24 m / s

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2018

7 Which quantities are both vectors? A acceleration and force B acceleration and pressure C density and force D density and pressure

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2018

8 A moving ball with a momentum of 25 kg m / s collides head-on with a wall. wall ball It rebounds from the wall with the same speed but in the opposite direction. The time of collision is 50 ms. What is the average force exerted on the wall by the ball during the collision? A 0.50 N B 1.00 N C 500 N D 1000 N

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2018

28 The diagrams represent two different electric fields. field 1 field 2 A single electron is located in each of the fields. Which row gives the correct direction of the force on the electron and the field in which there is a larger force on it? direction of larger force the force A ↓ field 1 B ↓ field 2 C ↑ field 1 D ↑ field 2

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2018

36 A wire is placed in a strong magnetic field. When a current is passed through the wire it moves upwards, as shown. S N movement The current is reversed. In which direction does the wire move? A downwards B towards the north pole C towards the south pole D upwards

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2018

6 A student wishes to determine the spring constant of a spring where it obeys Hooke’s law. Different loads are hung from the spring and its length is measured for each different load. The table shows the results of the experiment. weight of load / N 0 2.0 4.0 5.0 length of spring / cm 12 20 28 38 What is the value of the spring constant of the spring? A 0.13 N / cm B 0.14 N / cm C 0.19 N / cm D 0.25 N / cm

1 marks

Answer: D

This question in 0972/21 May/June 2019

7 A mass of 20 kg is held stationary by a rope passing over a frictionless pulley. pulley T 20 kg What is the tension T in the rope? A 10 kg B 20 kg C 100 N D 200 N

1 marks

Answer: D

This question in 0972/21 May/June 2019

4 Four students make statements about the mass of an object. Which statement is correct? A The mass of an object depends on the gravitational field which acts on the object. B The mass of an object divided by its weight is equal to the acceleration with which it falls freely. C The mass of an object increases when the temperature of the object increases. D The mass of an object resists change in motion of the object.

1 marks

Answer: D

This question in 0972/22 May/June 2019

6 An experiment is carried out to determine the spring constant for a spring. Different loads are hung from the spring and its length is measured for each different load. The graph shows how its length varies with load. 4.0 weight of load / N 3.0 2.0 1.0 0 0 4 8 12 16 20 length of spring / cm What is the value of the spring constant? A 0.20 N / cm B 0.25 N / cm C 4.0 N / cm D 5.0 N / cm

1 marks

Answer: B

This question in 0972/22 May/June 2019

7 A beam is pivoted at its centre of mass. It is acted upon by two forces, 10 N and 5.0 N, as shown. 25 cm 15 cm pivot 10 N 5.0 N What is the resultant moment about the pivot? A 25 N cm anticlockwise B 25 N cm clockwise C 175 N cm anticlockwise D 175 N cm clockwise

1 marks

Answer: B

This question in 0972/22 May/June 2019

8 Which object is in equilibrium? A B C D 2 N 2 N 2 N 2 N 2 N 2 N 2 N 2 N

1 marks

Answer: C

This question in 0972/22 May/June 2019

2 A light object is dropped from rest. It falls a large distance vertically through air. How can the motion of the object be described? A constant acceleration B increasing acceleration C decreasing acceleration and then moving at terminal velocity D increasing acceleration and then moving at terminal velocity

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2019

4 Which quantity is a force due to a gravitational field? A density B mass C weight D volume

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2019

6 A car is travelling around a circular track at a constant speed, as shown. In which direction is the resultant force on the car? D car C A direction of movement B

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2019

7 Two forces P and Q act on a metre rule as shown. The metre rule is pivoted at one end. The rule starts to rotate in a clockwise direction. Q a b metre rule pivot P Which statement is correct? A P equals Q B P is less than Q C (P × a) is equal to (Q × b) D (P × a) is greater than (Q × (a + b))

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2019

8 Which statement gives a complete description of any object that is in equilibrium? A There are no forces acting. B There is no resultant force. C There is no resultant force and no resultant turning effect. D There is no resultant turning effect.

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2019

13 A drawing pin (thumb tack) has a sharp point at one end and a flat surface at the other end. sharp point flat surface The pin is pushed into a wooden board. How do the pressure and the force at the sharp point compare with the pressure and the force on the flat surface? force at the sharp point pressure at the sharp point A greater than on the flat surface greater than on the flat surface B greater than on the flat surface less than on the flat surface C the same as on the flat surface greater than on the flat surface D the same as on the flat surface less than on the flat surface

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2019

4 Which statement correctly describes the effects of placing a heavy load in a car? A It is easier to accelerate the car and easier to bring the car to rest. B It is easier to accelerate the car but more difficult to bring the car to rest. C It is more difficult to accelerate the car and more difficult to bring the car to rest. D It is more difficult to accelerate the car but easier to bring the car to rest.

1 marks

Answer: C

This question in 0972/21 May/June 2020

7 The diagram shows a wooden beam PQ, of negligible weight, which is attached to a wall by a hinge at P and kept in a horizontal position by a vertical rope attached at Q. The beam is 3.0 m in length. A man of weight 800 N walks along the beam from P to Q. wall man rope beam P Q hinge What is the distance of the man from P when the tension in the rope at Q becomes equal to 500 N? A 0.53 m B 1.1 m C 1.9 m D 2.5 m

1 marks

Answer: C

This question in 0972/21 May/June 2020

9 An object of mass 1.2 kg is moving with a velocity of 2.0 m / s when it is acted on by a force of 4.0 N. The velocity of the object increases to 5.0 m / s. For what period of time does the force act on the object? A 0.90 s B 1.1 s C 1.5 s D 3.6 s

1 marks

Answer: A

This question in 0972/21 May/June 2020

4 Which statement correctly describes the effects of placing a heavy load in a car? A It is easier to accelerate the car and easier to bring the car to rest. B It is easier to accelerate the car but more difficult to bring the car to rest. C It is more difficult to accelerate the car and more difficult to bring the car to rest. D It is more difficult to accelerate the car but easier to bring the car to rest.

1 marks

Answer: C

This question in 0972/22 May/June 2020

7 A satellite orbits the Earth at constant speed in a circular orbit. Which statement is correct? A The resultant force on the satellite is zero. B The resultant force on the satellite is towards the Earth. C The resultant force on the satellite is away from the Earth. D The resultant force on the satellite is in the direction of motion.

1 marks

Answer: B

This question in 0972/22 May/June 2020

8 Two forces P and Q act on an object. Which diagram shows the resultant of these two forces? A B C D resultant resultant P P P P resultant resultant Q Q Q Q

1 marks

Answer: C

This question in 0972/22 May/June 2020

7 A uniform plank rests on a pivot at its centre. Two children P and Q sit on the plank in the positions shown. 1.2 m 1.5 m child P child Q pivot The mass of child P is 25 kg. The plank is balanced. What is the mass of child Q? A 20 kg B 25 kg C 31 kg D 45 kg

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2020

8 The diagram shows three forces acting on an object. 6 N 1 N 9 N What is the value of the resultant force acting on the object? A 2 N B 10 N C 14 N D 16 N

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2020

10 A stone is dropped from rest at a height of 2.0 m above the surface of a planet. The planet has no atmosphere. The speed of the stone just before reaching the surface of the planet is 3.8 m / s. What is the acceleration of free fall on the planet? A zero B 1.9 m / s2 C 3.6 m / s2 D 7.2 m / s2

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2020

5 A 20 m long, uniform bridge of weight 100 kN is supported at each end by pillars, as shown. T1 T2 20 m bridge pillar 24 kN pillar 100 kN The pillars exert forces T1 and T2 on the ends of the bridge. What are the values of T1 and T2 when a van of weight 24 kN is on the bridge, 5 m from the left-hand pillar? T1 / kN T2 / kN A 56 68 B 62 62 C 68 56 D 74 50

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2021

6 A spring, which obeys Hooke’s law, has an unstretched length of 10 cm. A load of 20 N is suspended from the spring. The new length of the spring is 36 cm. What is the spring constant k of the spring? A 0.56 N / cm B 0.77 N / cm C 1.3 N / cm D 1.8 N / cm

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2021

36 The diagrams show a horizontal wire in a magnetic field. The horizontal wire is firmly held at each end (not shown) and cannot move. The magnets and holder are on a balance. When there is no current in the wire, the reading on the balance is 0.35 g. fixed horizontal wire current direction N S balance N S 0.35 g fixed horizontal wire view from side view from above There is a d.c. current in the wire, as shown. What happens to the reading on the balance? A smaller than 0.35 g B no change C changing from smaller to larger than 0.35 g repeatedly D larger than 0.35 g

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2021

6 An object on the end of a string moves in a clockwise circular path at constant speed. The diagram shows the object as viewed from above. What is the direction of the resultant force on the object when it is in the position shown? string A B object D C

1 marks

Answer: A

This question in 0972/21 May/June 2022

7 A beam is pivoted at one end, as shown. 40 cm beam X pivot 6.0 N The beam weighs 6.0 N and its weight acts at a point X 40 cm from the pivot. A force of 4.0 N is applied to the beam causing it to balance horizontally. In which direction and where is the 4.0 N force applied? A vertically downwards at 20 cm to the left of X B vertically downwards at 20 cm to the right of X C vertically upwards at 20 cm to the left of X D vertically upwards at 20 cm to the right of X

1 marks

Answer: D

This question in 0972/21 May/June 2022

8 On the diagram shown, what is the magnitude of the resultant force of the two vectors? scale 2.0 N 6.0 N 8.0 N A 2.0 N B 7.0 N C 10 N D 14 N

1 marks

Answer: C

This question in 0972/21 May/June 2022

9 Three situations are listed. 1 An object has a resultant force acting on it. 2 A moving object experiences an impulse. 3 An object is decelerating. In which situations is the momentum of the object changing? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: D

This question in 0972/21 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 0972/21 May/June 2022

37 What is the purpose of the split-ring commutator in an electric motor? A to ensure that the magnetic field in the motor changes direction every half rotation B to ensure that the magnetic field in the motor stays in the same direction at all times C to ensure that the turning effect on the motor changes direction every half rotation D to ensure that the turning effect on the motor stays in the same direction at all times

1 marks

Answer: D

This question in 0972/21 May/June 2022

4 On the Moon, all objects fall with the same acceleration. Which statement explains this? A On the Moon, all objects have the same weight. B The Moon has a smaller gravitational field strength than the Earth. C The weight of an object is directly proportional to its mass. D The weight of an object is inversely proportional to its mass.

1 marks

Answer: C

This question in 0972/22 May/June 2022

6 An object moves at constant speed around a circular path. Which statement is correct? A A resultant force acts on the object outwards from the centre of the circle. B A resultant force acts on the object in the direction it is travelling. C A resultant force acts on the object towards the centre of the circle. D There is no resultant force acting on the object because it is moving at constant speed.

1 marks

Answer: C

This question in 0972/22 May/June 2022

7 A beam is pivoted at one end, as shown. 40 cm beam X pivot 6.0 N The beam weighs 6.0 N and its weight acts at a point X 40 cm from the pivot. A force of 4.0 N is applied to the beam causing it to balance horizontally. In which direction and where is the 4.0 N force applied? A vertically downwards at 20 cm to the left of X B vertically downwards at 20 cm to the right of X C vertically upwards at 20 cm to the left of X D vertically upwards at 20 cm to the right of X

1 marks

Answer: D

This question in 0972/22 May/June 2022

8 The diagram shows two forces acting at right angles to each other. scale 1.0 N 3.0 N 4.0 N What is the resultant of the two forces? A 1.0 N B 5.0 N C 7.0 N D 12.0 N

1 marks

Answer: B

This question in 0972/22 May/June 2022

5 A wheelbarrow has a weight W of 140 N. F 0.8 m W 1.4 m Which vertical force F is needed to support the wheelbarrow in the position shown? A 60 N B 80 N C 140 N D 245 N

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2022

6 A car is travelling around a circular track at a constant speed, as shown. In which direction is the resultant force on the car? D car C A direction of movement B

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2022

7 The diagram shows part of a hose used by a firefighter. nozzle NOT TO SCALE water water moving moving at 6 m / s at 1 m / s 15 kg of water flows through the hose each second. Which force is applied to the hose by the water? A 15 N B 75 N C 90 N D 105 N

1 marks

Answer: B

This question in 0972/21 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 0972/21 Oct/Nov 2022

1 Which vector diagram correctly shows the force Z as the resultant of forces X and Y? A B C D Y Y Z Z X X X X Z Z Y Y

1 marks

Answer: D

This question in 0972/21 May/June 2023

2 An object falls towards the surface of the Earth. The object is falling at its terminal velocity. Which statement is correct? A There is air resistance and the acceleration of the object is negative. B There is air resistance and the acceleration of the object is zero. C There is no air resistance and the acceleration of the object is negative. D There is no air resistance and the acceleration of the object is zero.

1 marks

Answer: B

This question in 0972/21 May/June 2023

7 A train is travelling horizontally in a straight line. A book is on a table in the train. The diagram shows all the forces acting on the book. contact force book frictional force table weight of book How is the train moving? A accelerating to the left of the diagram B accelerating to the right of the diagram C moving at uniform speed to the left of the diagram D moving at uniform speed to the right of the diagram

1 marks

Answer: B

This question in 0972/21 May/June 2023

8 The diagrams show four beams, each of negligible weight and freely pivoted. Which beam is not in equilibrium? A B 2.0 m 1.0 m 2.0 m 2.0 m 3.0 N pivot 6.0 N 6.0 N pivot 6.0 N C D 1.0 m 2.0 m 2.0 m 1.0 m 1.0 m 3.0 N pivot 3.0 N 4.0 N pivot 4.0 N 2.0 N

1 marks

Answer: C

This question in 0972/21 May/June 2023

9 An object of mass 1.2 kg is moving with a velocity of 2.0 m / s when it is acted on by a force of 4.0 N. The velocity of the object increases to 5.0 m / s in the same direction. For which period of time does the force act on the object? A 0.90 s B 1.1 s C 1.5 s D 3.6 s

1 marks

Answer: A

This question in 0972/21 May/June 2023

23 An unmagnetised piece of soft iron is placed close to a strong permanent magnet, as shown. S N X permanent soft iron magnet What is the induced polarity of end X of the soft iron and in which direction does the magnetic force act on the soft iron? direction of force polarity of end X on the soft iron A N to the left B N to the right C S to the left D S to the right

1 marks

Answer: C

This question in 0972/21 May/June 2023

1 Forces of 3 N and 4 N act at right angles, as shown. X Y 3 N O 4 N Z What is the resultant force? A 1 N along XZ B 5 N along XZ C 5 N along OY D 7 N along OY

1 marks

Answer: C

This question in 0972/22 May/June 2023

2 A light ball is held at rest at the top of a tall cliff. It is released and falls through the air, eventually reaching its terminal velocity. Which row describes the behaviour of the ball as it descends? the initial the final acceleration acceleration of the ball of the ball A 0 0 B 0 g C g 0 D g g

1 marks

Answer: C

This question in 0972/22 May/June 2023

7 A truck is towing a car along a straight horizontal road at a constant speed. truck car rope The rope breaks. Which row gives the direction of the initial acceleration of the truck after the rope breaks and the reason for the acceleration? direction of acceleration reason of the truck A left the driving force is greater than the resistive forces on the truck B left the driving force is smaller than the resistive forces on the truck C right the driving force is greater than the resistive forces on the truck D right the driving force is smaller than the resistive forces on the truck

1 marks

Answer: C

This question in 0972/22 May/June 2023

8 A uniform beam is pivoted at the centre and two identical masses, X and Y, are placed so that the beam balances. A smaller mass is then added at the position shown. position of small mass X Y pivot How can the masses be positioned so the beam balances again? A Move X away from the pivot. B Move X towards the pivot. C Move Y towards the pivot. D Move the small mass away from the pivot.

1 marks

Answer: B

This question in 0972/22 May/June 2023

9 A resultant force of 2.0 N acts on an object of mass 3.0 kg for 6.0 s. What is the change in velocity of the object? A 0.25 m / s B 1.0 m / s C 4.0 m / s D 36 m / s

1 marks

Answer: C

This question in 0972/22 May/June 2023

3 An object reaches terminal velocity after being dropped and falling through air. Which graph shows how its speed varies with time? A B speed speed 0 0 0 time 0 time C D speed speed 0 0 0 time 0 time

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2023

5 Which moving object has a resultant force acting on it? A a diver rising vertically through water at constant speed B an aircraft circling an airport at constant speed C a train going up a straight incline at constant speed D a parachutist descending vertically at terminal velocity

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2023

6 Forces are applied to four identical objects. The length of each arrow indicates the magnitude of the force. Which object is in equilibrium? A B C D

1 marks

Answer: B

This question in 0972/21 Oct/Nov 2023

5 Four objects each have two forces acting on them. Which object is in equilibrium? A B C D 1.0 N 1.0 N 1.0 N 1.0 N 1.0 N 1.0 N 1.0 N 1.0 N

1 marks

Answer: A

This question in 0972/21 May/June 2024

30 A conducting wire is placed between the poles of a magnet. When an electric current in the wire is in the direction shown, then the force on the wire acts out of the page. wire N S Three statements of different conditions and how the wire is affected are given. 1 When the current is towards the top of the page and the direction of the magnetic field is unchanged, the force produced acts into the page. 2 When the current is towards the bottom of the page and the magnetic field is reversed, the force produced acts into the page. 3 When the current in the wire is alternating, the wire vibrates into and out of the page. Which statements are correct? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 0972/21 May/June 2024

5 Each diagram shows three forces on a beam. In which situation is it possible for the three forces shown to be in equilibrium? A B C D

1 marks

Answer: D

This question in 0972/22 May/June 2024

6 A gymnast jumps down from a high piece of apparatus. She gradually bends her knees as she lands. Which effect does this have? A She will have a smaller change of momentum as she lands. B She will lose less kinetic energy as she lands. C She will exert a smaller impulse on the ground as she lands. D She will experience a smaller force from the ground as she lands.

1 marks

Answer: D

This question in 0972/22 May/June 2024

3 The diagram shows the vertical forces acting on a ball as it falls vertically through the air. The ball does not reach terminal velocity. air resistance weight Which row describes what happens to the resultant force on the ball and what happens to the acceleration of the ball as it falls through the air? resultant force acceleration A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2024

4 A coconut falls from a palm tree. At X, it has just started falling. Y is the point just before it hits the ground. X Y What is the acceleration of the coconut at X? (Air resistance can be ignored.) A zero B less than that at Y C the same as that at Y D more than that at Y

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2024

5 A car is driven round a bend in the road at a constant speed. car direction of the motion of the car What is the direction of the resultant force on the car when it is going round the bend? A parallel to the motion and in the same direction as the motion B parallel to the motion and in the opposite direction to the motion C perpendicular to the motion and towards the inside of the bend D perpendicular to the motion and towards the outside of the bend

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2024

6 The diagram shows a drawbridge that is attached to a wall by a hinge at one end and a cable at the other. cable wall tension hinge drawbridge weight The weight of the drawbridge and the tension in the cable are represented by the labelled arrows in the diagram. There is a third force at the hinge, which is not shown. The drawbridge is in equilibrium. Which arrow shows a possible direction for the force at the hinge? A B C D

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2024

7 Which equation gives the momentum change of an object? force A momentum change = area B momentum change = force  distance momentum change = force  distance C time D momentum change = force  time

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2024

2 The diagram shows the four forces acting on an aircraft in flight. 120 kN 40 kN 60 kN 60 kN Which arrow shows the direction of the resultant of the four forces? A B C D

1 marks

Answer: B

This question in 0972/21 May/June 2025

5 A spring has a length of 25 cm when a load of 2.0 N is suspended from it. The spring has a length of 35 cm when a 7.0 N load is used. What is the spring constant of the spring? A 0.20 N / cm B 0.50 N / cm C 2.0 N / cm D 5.0 N / cm

1 marks

Answer: B

This question in 0972/21 May/June 2025

6 The diagrams E–H show a block of wood on a frictionless surface. In each diagram, the block has two forces acting on its sides. 2 N 2 N 2 N 2 N 2 N 2 N 2 N 2 N E F G H Which diagrams show the block in equilibrium? A E, F, G and H B E, G and H only C E and F only D G and H only

1 marks

Answer: D

This question in 0972/21 May/June 2025

8 A force acting on a moving ball causes its motion to change. This force stays constant. What makes the force produce a greater change in the motion of the ball? A decreasing the total mass of the ball B increasing the temperature of the ball C using a ball with a hollow centre but the same mass D using a different material for the ball so that it has a lower density but the same mass

1 marks

Answer: A

This question in 0972/21 May/June 2025

9 A farmer has two carts. The carts have the same weight, but one has four narrow wheels and the other has four wide wheels. narrow wheel wide wheel Which cart wheels sink less into soft ground and what is the reason? cart wheels reason A narrow greater pressure on the ground B narrow less pressure on the ground C wide greater pressure on the ground D wide less pressure on the ground

1 marks

Answer: D

This question in 0972/21 May/June 2025

5 A spring has a spring constant k. What is a possible unit for k ? A metre per newton B newton metre C newton per metre D newton per metre squared

1 marks

Answer: C

This question in 0972/21 Oct/Nov 2025

6 Which statement about the moment of a force is not correct? A If an object is balanced about a pivot, the resultant moment on the object must be zero. B The moment of a force is a measure of its turning effect. C The moment of a force about a point is equal to: force  perpendicular distance from the point. D The moment of a force about a point increases when the perpendicular distance of the force from the point decreases.

1 marks

Answer: D

This question in 0972/21 Oct/Nov 2025

7 The momentum of a car changes from 10 000 kg m / s to 15 000 kg m / s in a time of 8.0 s. What is the resultant force acting on the car? A 630 N B 3100 N C 40 000 N D 200 000 N

1 marks

Answer: A

This question in 0972/21 Oct/Nov 2025