Forces — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

30 Two children X and Y pull on a rope in opposite directions. The diagram shows the size of each force and its direction. X Y 500 N 450 N What is the resultant force on the rope? A 50 N towards X B 50 N towards Y C 950 N towards X D 950 N towards Y

1 marks

Answer: A

This question in 0973/11 May/June 2020

30 Which statement applies to a system in equilibrium? A There is a resultant force and there is a resultant turning effect on the system. B There is a resultant force but there is no resultant turning effect on the system. C There is no resultant force but there is a resultant turning effect on the system. D There is no resultant force and there is no resultant turning effect on the system.

1 marks

Answer: D

This question in 0973/11 May/June 2021

30 Three objects X, Y and Z are at rest on a table. The centre of mass of each object is labelled M. M M M X Y Z What is the order of stability of these three objects, from most stable to least stable? A X  Y  Z B Y  Z  X C X  Z  Y D Z  Y  X

1 marks

Answer: D

This question in 0973/12 May/June 2021

29 The diagram shows a large force of magnitude P and a small force of magnitude Q acting on a box. box P Q Which expression gives the magnitude of the resultant force on the box? P A P + Q B P – Q C P  Q D Q

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2021

29 The diagrams show the only forces acting on four moving objects. Which object is travelling at constant speed? A B 9 N 10 N 10 N C D 10 N 10 N 10 N

1 marks

Answer: D

This question in 0973/11 May/June 2022

30 A uniform plank is placed on a pivot, with its centre immediately above the pivot. A load of 10 N is suspended on the left, 45 cm from the pivot, and a load of 20 N is suspended on the right, 45 cm from the pivot. 45 cm 45 cm 10 N 20 N What happens to the plank? A The left-hand side moves down, the right-hand side moves up and the plank does not return to its horizontal position. B The left-hand side moves up, the right-hand side moves down and the plank does not return to its horizontal position. C The plank moves down on one side then returns to its horizontal position. D The plank remains horizontal without moving.

1 marks

Answer: B

This question in 0973/11 May/June 2022

29 The diagrams show the two forces acting on four objects P, Q, R and S. P Q 4 N 12 N 12 N 4 N R S 2 N 8 N 10 N 2 N Which two objects experience equal resultant forces acting in the same direction? A P and Q B P and R C Q and R D Q and S

1 marks

Answer: D

This question in 0973/12 May/June 2022

30 A force of 10 N is applied to a beam at a distance of 0.25 m from a pivot. 10 N 0.25 m pivot Which calculation gives the moment of the force about the pivot in N m? 10 A 10  0.25 B 0.25 C 10 + 0.25 D 10 – 0.25

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2022

30 The diagrams show all the forces acting on each of four objects. Which object is not in equilibrium? A B 4.0 N 4.0 N 6.0 N 5.0 N 8.0 N 8.0 N 2.0 N 3.0 N 4.0 N 4.0 N C D 3.0 N 4.0 N 3.0 N 2.0 N 6.0 N 6.0 N 6.0 N 6.0 N 7.0 N 4.0 N

1 marks

Answer: D

This question in 0973/11 May/June 2023

31 The diagram shows a triangular sheet of metal with sides of length 50 cm, 40 cm and 30 cm. The sheet is free to move about a pivot at the top corner, as shown. pivot 50 cm 40 cm 5.0 N 30 cm A cord is attached to the bottom left corner of the sheet and pulled with a horizontal force of 5.0 N to the left. What is the moment of the 5.0 N force about the pivot? A 150 N cm B 200 N cm C 250 N cm D 600 N cm

1 marks

Answer: B

This question in 0973/11 May/June 2023

28 Two children X and Y pull on a rope in opposite directions. The diagram shows the size of each force and its direction. X Y 500 N 450 N What is the resultant force on the rope? A 50 N towards X B 50 N towards Y C 950 N towards X D 950 N towards Y

1 marks

Answer: A

This question in 0973/12 May/June 2023

29 A boy pulls a nail from a block of wood using a hammer, as shown. 15 N hammer 0.22 m nail block of wood 0.060 m pivot The boy pulls the hammer with a force of 15 N in the position shown. What is the moment produced about the pivot by the boy pulling on the hammer? A 0.90 N m B 2.4 N m C 3.3 N m D 4.2 N m

1 marks

Answer: C

This question in 0973/12 May/June 2023

30 The diagram shows a child of weight 240 N sitting on a see-saw (teeter-totter) at a distance of 1.6 m from the pivot. 1.6 m child pivot 240 N What is the moment of the weight of the child about the pivot, with the correct unit? A 150 N m B 150 N / m C 384 N m D 384 N / m

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2023

29 The diagrams show all the forces acting on three objects, X, Y and Z. 10 N 5 N X Y Z 10 N 10 N 10 N 10 N 15 N Which of the objects experience a resultant force? A X, Y and Z B X only C Y and Z only D Y only

1 marks

Answer: C

This question in 0973/11 May/June 2024

30 Which statement about a resultant force is correct? A An object must have a resultant force acting on it if it is moving. B An object must have a resultant force acting on it if it is slowing down. C Two forces must be in the same direction to produce a resultant force. D Two forces must have the same magnitude to produce a resultant force.

1 marks

Answer: B

This question in 0973/12 May/June 2024

29 The diagram shows the two forces acting on a skydiver. 300 N 700 N What is the resultant force on the skydiver? A 400 N downwards B 400 N upwards C 1000 N downwards D 1000 N upwards

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2024

29 A metal bar has weight 50 N and length 2.0 m. The centre of gravity of the bar is 0.80 m from the left-hand end. The bar is placed on a pivot at a point 0.40 m from the left-hand end. 0 m 0.40 m 0.80 m 2.0 m centre pivot of gravity What is the moment of the weight of the bar about the pivot? A 20 N m B 40 N m C 60 N m D 80 N m

1 marks

Answer: A

This question in 0973/11 May/June 2025

30 The diagram shows a large force of magnitude P and a small force of magnitude Q acting on a box. box P Q Which expression gives the magnitude of the resultant force on the box? P A B P  Q C P – Q D P + Q Q

1 marks

Answer: C

This question in 0973/11 May/June 2025

28 The diagrams show the only forces acting on each of four objects moving in a straight line. Which object is moving at constant speed in a straight line? A B 2.0 N 2.0 N 2.0 N C D 2.0 N 2.0 N 2.0 N 2.0 N

1 marks

Answer: D

This question in 0973/12 May/June 2025

30 The diagram shows four objects, P, Q, R and S, with uniform density, resting on different horizontal surfaces. The objects are all drawn to the same scale. P Q R S The surfaces are slowly tilted through an angle  until the object falls over. object θ For which object is the value of  the greatest? A object P B object Q C object R D object S

1 marks

Answer: B

This question in 0973/12 May/June 2025