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, 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.