A mechanical engineering team is testing the stopping distances of a prototype electric vehicle equipped with different regenerative braking configurations. They measure the total stopping distance of the vehicle from an initial velocity of 25 m s-1 under two configurations, Configuration A and Configuration B.
The table below shows the stopping distances recorded across five trials for each configuration.
| Configuration | Trial 1 distance (m) | Trial 2 distance (m) | Trial 3 distance (m) | Trial 4 distance (m) | Trial 5 distance (m) | Mean distance (m) |
|---|---|---|---|---|---|---|
| Configuration A | 34.2 | 36.5 | 33.8 | 35.9 | 34.6 | 35 |
| Configuration B | 45.8 | 48.2 | 46.4 | 49.1 | 47.5 | ? |
Calculate the mean stopping distance for Configuration B. Give your answer correct to 2 significant figures.
39 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.