A motor scooter is tested under fixed conditions. In every trial, 0.50 s passes between the rider noticing the stop signal and applying the brakes.
| Speed in m/s\mathrm{m/s}m/s | Stopping distance in m\mathrm{m}m |
|---|---|
| 12 | 18.0 |
| 17 | 32.5 |
| 18 | 36.0 |
| 20 | 43.3 |
| 24 | 60.0 |
At which speed is the braking distance twice the braking distance at 12 m/s?
17 m/s17\ \mathrm{m/s}17 m/s
24 m/s24\ \mathrm{m/s}24 m/s
20 m/s20\ \mathrm{m/s}20 m/s
18 m/s18\ \mathrm{m/s}18 m/s
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.