A student investigated reaction times using a ruler drop test under two different conditions: without distraction and with distraction.
Our results are shown in the table below.
| Condition | Trial 1 (cm) | Trial 2 (cm) | Trial 3 (cm) | Trial 4 (cm) | Trial 5 (cm) | Average distance (cm) |
|---|---|---|---|---|---|---|
| Without distraction | 12.5 | 14.2 | 11.8 | 13.1 | 10.9 | 12.5 |
| With distraction | 18.2 | 22.1 | 19.5 | 21.4 | 20.8 | 20.4 |
Calculate the average reaction time for the trials without distraction.
Use the equation:
time2=average distance490 \text{time}^2 = \frac{\text{average distance}}{490} time2=490average distanceGive your answer to 2 significant figures.
39 exam-style questions on Edexcel GCSE Physics 2.5 Stopping and braking distances. Each one has a worked solution and a mark scheme showing where the marks go.