A group of students investigated reaction times using the ruler-drop test. They compared the catch distance of their dominant hand against their non-dominant hand.
The table below shows their results.
| Hand | Trial 1 distance (cm) | Trial 2 distance (cm) | Trial 3 distance (cm) | Trial 4 distance (cm) | Trial 5 distance (cm) | Mean distance (cm) |
|---|---|---|---|---|---|---|
| Dominant | 12.1 | 14.3 | 11.5 | 13.8 | 12.9 | 13 |
| Non-dominant | 16.2 | 19.5 | 17.3 | 18.8 | 20.1 | ? |
Calculate the mean distance dropped for the non-dominant hand. 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.