A cyclist puts oil on the chain and on the bearings of a bicycle.
Give one reason why oiling the moving parts of the bicycle is useful.
The cyclist stops pedalling on a flat road. The bicycle slows down and stops. Describe the energy transfer that takes place as the bicycle slows down.
A student says, 'The energy in the kinetic store of the bicycle is destroyed when the bicycle stops.' Write a corrected version of this sentence.
40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.