Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Work and Power
58 practice questions
Topics covered
Practice questions
11–20 of 26 · Easy
Question 11
1 mark · Easy
Answer and see the solution →Give the SI unit for kinetic energy.
Question 12
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 .
Question 13
1 mark · Easy
Answer and see the solution →Name the energy store that increases when an object is moved upwards away from the ground.
Question 14
2 marks · Easy
Answer and see the solution →A toy of mass 0.5 kg is lifted from the floor onto a table 0.8 m high. Calculate the increase in gravitational potential energy. Take .
Question 15
2 marks · Easy
Answer and see the solution →Describe what happens to the energy stores of a ball when it is dropped from a height until it comes to rest on the ground.
Question 16
1 mark · Easy
Answer and check →Which of the following is the correct formula for calculating power?
- A.Power = Work done / Time taken
- B.Power = Mass × Acceleration
- C.Power = Distance / Time taken
- D.Power = Force × Distance
Question 17
1 mark · Easy
Answer and see the solution →State the SI unit of power.
Question 18
2 marks · Easy
Answer and see the solution →Give two examples of energy stores or forms between which energy is transferred when someone jumps off a diving board into a swimming pool.
Question 19
2 marks · Easy
Answer and see the solution →A bulb transfers 36 J of energy in 12 seconds. Calculate the power of the bulb.
Question 20
2 marks · Easy
Answer and see the solution →Explain what happens to the gravitational potential energy and kinetic energy of a ball as it rolls down a smooth slope.