Question 17
FA student uses the ruler-drop test to measure her reaction time.
The Figure shows how the test is set up.
Figure
The student does the test four times. The Table shows her results.
Table
| Trial | Distance the ruler falls in cm\text{cm}cm |
|---|---|
| 1 | 17 |
| 2 | 20 |
| 3 | 14 |
| 4 | 19 |
a.[3]
Describe how the student should use the apparatus to obtain an accurate value for the distance the ruler falls.
b.[2]
Calculate the mean distance the ruler falls.
c.[2]
Explain why the reaction time of the student when she is driving a car is likely to be longer than the reaction time measured by the ruler-drop test.
2.5 Stopping and braking distances Questions
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.