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
171–173 of 173
Question 171
4 marks · Normal
Answer and see the solution →A tennis ball of mass 60 g is dropped from rest. It eventually reaches a constant terminal velocity as it falls through the air.
(a)[1 mark]Calculate the weight of the tennis ball. (Take .)
(b)[2 marks]Describe what happens to the forces acting on the ball as it falls until it reaches terminal velocity.
(c)[1 mark]Explain why the ball continues to move at terminal velocity instead of speeding up.
Question 172
6 marks · Normal
Answer and see the solution →Two students each pull on a rope in opposite directions. Student A pulls with 160 N to the right, Student B pulls with 120 N to the left. The rope is attached to a box of mass 10 kg resting on a rough surface.
(a)[1 mark]Calculate the resultant (unbalanced) force on the box.
(b)[2 marks]Determine the acceleration of the box. (Assume friction is 10 N, acting to the left.)
(c)[2 marks]Draw a vector diagram to show all the horizontal forces acting on the box.
(d)[1 mark]State whether the box moves left, right or remains at rest. Explain why.
Question 173
5 marks · Normal
Answer and see the solution →A cyclist of mass 75 kg is travelling along a road. A 12 N friction force opposes their motion. The cyclist pedals, applying a driving force of 22 N forward.
(a)[1 mark]State the size and direction of the resultant force.
(b)[2 marks]Calculate the acceleration of the cyclist.
(c)[2 marks]Explain what will happen to the cyclist if the driving force is reduced to 12 N.