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8.1 Physics on the move

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Question 13
H

The Figure shows how the thinking distance and the braking distance of a car change with speed.

Figure

image

a.

Use the Figure to determine the overall stopping distance at 20 m/s.

[2]
b.

Determine the reaction time of the driver used to draw the Figure.

[2]
c.

Use data from the Figure to show that the braking distance is proportional to the square of the speed.

[2]
d.

Explain why the braking distance depends on the speed in this way.

Refer to energy in your answer.

[3]
Markscheme

8.1 Physics on the move Questions

  1. GCSE
  2. /Physics
  3. /8.1 Physics on the move

50 exam-style questions on OCR GCSE Physics 8.1 Physics on the move, covering 8.1.1 Typical everyday speeds, 8.1.2 Typical everyday accelerations, 8.1.3 Ratios, units and rates on the road, 8.1.4 Human reaction times, 8.1.5 Factors affecting stopping distance, 8.1.6 Stopping distances at different speeds, 8.1.7 Dangers of large decelerations, 8.1.8 Estimating forces in road situations, and 8.1.9 Estimating the effects of large accelerations. Each one has a worked solution and a mark scheme showing where the marks go.

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