Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Units (Energy)
16 practice questions
Practice questions
11–16 of 16
Question 11
3 marks · Normal
Answer and see the solution →A cyclist moves at a speed of 8 m/s. The total mass of the cyclist and bicycle is 75 kg.
(a)State the correct SI units for:
(i)[1 mark]mass
(ii)[1 mark]speed
(b)[1 mark]Calculate the kinetic energy of the cyclist and bicycle. Give your answer in standard SI units.
Question 12
2 marks · Normal
Answer and see the solution →Write down the SI base unit and its symbol for acceleration.
Question 13
3 marks · Normal
Answer and see the solution →An electric motor lifts a 50 kg load a height of 5 m in 10 seconds. Gravitational field strength g = 10 N/kg.
(a)[2 marks]Calculate the work done by the electric motor. Include the correct unit in your answer.
(b)[1 mark]Calculate the power output of the motor. State the correct unit.
Question 14
2 marks · Normal
Answer and see the solution →A force of 6 N acts on an object for 5 seconds. State the SI unit for each of these two quantities.
(a)[1 mark]Force
(b)[1 mark]Time (duration)
Question 15
3 marks · Normal
Answer and see the solution →A lamp uses 120 joules of energy in 60 seconds.
(a)[1 mark]State the formula for power and the correct SI unit.
(b)[2 marks]Calculate the power output of the lamp.
Question 16
3 marks · Normal
Answer and see the solution →Complete the table below by filling in the missing SI units for each quantity.
Quantity Unit Mass Distance Energy