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2.5 Stopping and braking distances

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Question 43
F

A car has a mass of 1200 kg. It travels along a level road at 15 m/s.

a.

Write down the equation linking kinetic energy, mass and speed.

[1]
b.

Calculate the kinetic energy of the car.

[2]
c.

The driver applies the brakes. A constant braking force of 6000 N brings the car to rest.

The work done by the braking force is equal to the kinetic energy of the car.

Calculate the braking distance of the car.

[3]
d.

The car now travels at 30 m/s. The braking force is the same.

Explain why the braking distance is four times greater than at 15 m/s.

[3]
Markscheme

2.5 Stopping and braking distances Questions

  1. GCSE
  2. /Physics
  3. /2.5 Stopping and braking distances

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.

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