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2 Motion and forces

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Question 107
H

A van of mass 2500 kg travels at 18 m/s. The driver makes an emergency stop. The braking distance is 27 m.

a.

Calculate the deceleration of the van while it is braking.

Use the equation

v2−u2=2×a×xv^2 - u^2 = 2 \times a \times xv2−u2=2×a×x

[3]
b.

Calculate the braking force on the van.

[2]
c.

A box of mass 20 kg is in the back of the van. The box is not fixed in place.

Explain why the box may slide forwards during the emergency stop.

Use a calculation in your answer.

[3]
Markscheme

2 Motion and forces Questions

  1. GCSE
  2. /Physics
  3. /2 Motion and forces

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