A transport company uses an electronic reaction timer to test one minibus driver. The results are shown in the table.
| Test | Reaction time in s |
|---|---|
| 1 | 0.36 |
| 2 | 0.40 |
| 3 | 0.38 |
| 4 | 0.42 |
| 5 | 0.39 |
The minibus travels at a constant speed of 16 m/s while the driver reacts to a hazard. The braking distance is 22 m.
Calculate the stopping distance of the minibus.
Give your answer to two significant figures.
The company concludes that the stopping distance calculated in (a) can be used for every minibus driver travelling at the same speed under the same conditions.
Evaluate this conclusion.
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.