A car brakes to rest from a speed of 12 m/s. The same car later brakes to rest from a speed of 24 m/s using the same braking force.
How does the braking distance from 24 m/s compare with the braking distance from 12 m/s?
It is the same, because the braking force on the car has not changed.
It is twice as great, because the starting speed of the car is doubled.
It is three times as great, because some of the extra energy is shared.
It is four times as great, because the kinetic energy is four times greater.
40 exam-style questions on AQA GCSE Physics 5.2 Work done and energy transfer, covering 5.2 Work done and energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.