Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Work and Power
58 practice questions
Topics covered
Practice questions
11–20 of 58
Question 11
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 12
1 mark · Normal
Answer and see the solution →What is the unit of work done in the SI system?
Question 13
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 14
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 15
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.
Question 16
1 mark · Easy
Answer and see the solution →State the equation used to calculate the kinetic energy of an object.
Question 17
1 mark · Easy
Answer and check →Which of the following will increase the kinetic energy of a moving skateboard most?
- A.Doubling the mass of the skateboard
- B.Doubling the speed of the skateboard
- C.Halving the mass of the skateboard
- D.Halving the speed of the skateboard
Question 18
2 marks · Easy
Answer and see the solution →A bicycle and its rider have a total mass of 70 kg and are moving with a speed of 5 m/s. Calculate their kinetic energy. Give your answer in joules.
Question 19
1 mark · Easy
Answer and see the solution →Give the SI unit for kinetic energy.
Question 20
3 marks · Easy
Answer and see the solution →A book of mass 2 kg is resting on a shelf that is 4 m above the ground.
(a)[1 mark]State the equation you would use to calculate the gravitational potential energy (GPE) of the book.
(b)[2 marks]Calculate the GPE of the book. Take .