Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Energy and work
15 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
3 marks · Normal
Answer and see the solution →A builder lifts a bucket of cement with a force of 180 N to the top of some scaffolding 3.0 m above the ground.
(a)[3 marks]Calculate the work done by the builder on the bucket.
Question 2
4 marks · Normal
Answer and see the solution →A box is pushed along a floor by a force of 50 N for a distance of 6 m.
(a)[1 mark]State the equation for work done.
(b)[2 marks]Calculate the work done on the box.
(c)[1 mark]State the energy transfer that takes place in this process.
Question 3
2 marks · Normal
Answer and see the solution →State and explain the relationship between the work done on an object and the energy transferred to that object.
Question 4
1 mark · Normal
Answer and check →A student drags a sled across the playground applying a force of 60 N for 4.0 m. What is the work done by the student?
- A.15 J
- B.240 J
- C.64 J
- D.24 J
Question 5
1 mark · Normal
Answer and see the solution →What is the unit of work done in the SI system?
Question 6
3 marks · Normal
Answer and see the solution →Figure 1 shows a girl pulling a suitcase with a force of 30 N over a horizontal distance of 8 m on a smooth airport floor.
(a)[2 marks]Calculate the total work done by the girl on the suitcase.
(b)[1 mark]What is the energy transferred to the suitcase?
Question 7
2 marks · Normal
Answer and see the solution →Explain why no work is done when a person tries to push a wall but the wall does not move.
Question 8
4 marks · Normal
Answer and see the solution →A man pulls a cart in a straight line by applying a constant horizontal force of 120 N. The cart moves 5.0 m in the direction of the force.
(a)[2 marks]Calculate the work done on the cart.
(b)[1 mark]State the amount of energy transferred to the cart.
(c)[1 mark]Explain what would happen to the work done if the force applied was doubled but the distance stayed the same.