Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Forces, Movement, Shape, and Momentum
173 practice questions
Topics covered
- FORCES AND SHAPE29 practice questions
- HOOKE'S LAW16 practice questions
- FORCE, MASS AND ACCELERATION18 practice questions
- FRICTION AND BRAKING20 practice questions
- AIR RESISTANCE AND TERMINAL VELOCITY19 practice questions
- MOMENTUM20 practice questions
- NEWTON'S THIRD LAW: ACTION AND REACTION16 practice questions
- THE TURNING EFFECT OF FORCES24 practice questions
Practice questions
51–60 of 67 · Easy
Question 51
2 marks · Easy
Answer and see the solution →When a fish swims by pushing water backwards with its fins, it moves forward. Use Newton's third law to explain why the fish moves forward.
Question 52
1 mark · Easy
Answer and see the solution →A cat jumps down from a chair to the floor. According to Newton’s third law, what does the floor do to the cat as it lands?
Question 53
2 marks · Easy
Answer and see the solution →A student uses a broom to push a box across the floor. Use Newton's third law to explain what happens to the broom and the box as the broom applies a force.
Question 54
1 mark · Easy
Answer and check →Which of the following best describes Newton's third law?
- A.For every action there is an equal and opposite reaction.
- B.An object remains at rest unless acted on by a resultant force.
- C.The larger the mass, the larger the force needed to accelerate it.
- D.The total momentum of a system is conserved.
Question 55
1 mark · Easy
Answer and see the solution →State the unit used for the moment of a force.
Question 56
1 mark · Easy
Answer and check →Which of the following statements about moments is correct?
- A.The moment of a force increases if the force is applied further from the pivot.
- B.The moment of a force does not depend on the distance from the pivot.
- C.Moments are measured in newtons (N).
- D.The moment of a force increases if the force is applied closer to the pivot.
Question 57
2 marks · Easy
Answer and see the solution →A child pushes horizontally with a force of 60 N on a swing seat, which is 0.4 m from the pivot. Calculate the moment of the force about the pivot.
Question 58
3 marks · Easy
Answer and see the solution →A see-saw is balanced. Child A weighs 250 N and sits 1.2 m from the pivot. Child B weighs 300 N. Both are seated on opposite sides of the pivot.
(a)[1 mark]Calculate the moment produced by Child A about the pivot.
(b)[2 marks]How far from the pivot must Child B sit to balance the see-saw?
Question 59
1 mark · Easy
Answer and see the solution →What is the name given to the point through which the weight of a body acts?
Question 60
2 marks · Easy
Answer and see the solution →Describe how you would find the centre of gravity of a rectangular sheet of card.