The same amusement-ride carriage is tested under two conditions. The mean braking force is constant during each test.
| Test | Initial speed | Mean braking force | Braking distance |
|---|---|---|---|
| A | 8 m/s | 16 kN16\ \mathrm{kN}16 kN | 12 m |
| B | 12 m/s | 12 kN12\ \mathrm{kN}12 kN | — |
Calculate the braking distance in test B.
Explain why the braking distance in test B is greater than in test A.
126 exam-style questions on Edexcel GCSE Physics 2.5 Stopping and braking distances, covering 2.5.1 Stopping distance and reaction time, 2.5.2 Factors affecting stopping distance, 2.5.3 Dangers of large decelerations, and 2.5.4 Braking distance and initial speed. Each one has a worked solution and a mark scheme showing where the marks go.