What this practice covers
These questions are drawn from past CIE 9702 Physics papers and filtered to work, energy and power. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
Start practising practice questions →
What examiners see students get wrong here
These are the errors that cost marks on work, energy and power, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Forgetting cos θ when the force is at an angle to the motion.
- Saying work is done by a force perpendicular to the motion.
- Using the distance along a slope as h in mgh instead of the vertical drop.
- Forgetting that kinetic energy depends on the square of the speed, so doubling the speed doubles the energy.
- Using P = Fv with a force that is not the driving force.
- Writing efficiency as input over output, giving an answer above 100%.
- Saying wasted energy is destroyed.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Work, energy and power revision notes.