Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Forces and Motion
367 practice questions
Topics covered
Practice questions
121–130 of 145 · Easy
Question 121
2 marks · Easy
Answer and see the solution →A man stands on the ground and pulls a rope that is attached to a heavy box. According to Newton's third law, what force acts on the man while he is pulling the rope? State both the direction and the object applying the force.
Question 122
2 marks · Easy
Answer and see the solution →When a rubber ball bounces against a hard wall, explain, using Newton’s third law, why the ball bounces back.
Question 123
2 marks · Easy
Answer and see the solution →Two ice skaters push against each other and move apart on a frozen lake. Using Newton’s third law, state how the forces on each skater compare. State the direction of each force.
Question 124
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 125
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 126
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 127
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 128
1 mark · Easy
Answer and see the solution →State the unit used for the moment of a force.
Question 129
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 130
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.