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
121–130 of 173
Question 121
5 marks · Hard
Answer and see the solution →A 1500 kg car is moving at 12 m/s along a straight road. The driver presses the brakes and brings the car to a complete stop in 2.8 s.
(a)[2 marks]Calculate the change in momentum of the car.
(b)[2 marks]Calculate the average braking force exerted on the car.
(c)[1 mark]Explain in physics terms why increasing the stopping time would affect the force experienced by the car.
Question 122
5 marks · Hard
Answer and see the solution →A fireworks shell of mass 0.75 kg is initially at rest. It explodes in mid-air into two fragments: fragment X (0.45 kg) flies west at 16 m/s and fragment Y (unknown mass) flies east.
(a)[1 mark]Calculate the mass of fragment Y produced in the explosion.
(b)[3 marks]Calculate the velocity of fragment Y after the explosion.
(c)[1 mark]Explain why fragment Y moves in the opposite direction to fragment X.
Question 123
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 124
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 125
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 126
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 127
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 128
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 129
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 130
2 marks · Normal
Answer and see the solution →A student stands on a skateboard in a stationary position. She pushes against a wall with her hands and starts moving backwards.
(a)[2 marks]Explain, using Newton's third law, why the student moves backwards when she pushes against the wall.