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3 Conservation of energy

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Question 14

Two identical rubber balls, P and Q, each have a mass of 0.25 kg.

The balls move towards separate thick foam blocks.

BallSpeed in m/s\text{m/s}m/s
P4.0
Q12

Use the equation

Ek=12mv2E_{\mathrm{k}}=\dfrac{1}{2}mv^2Ek​=21​mv2

a.

State the factor by which the kinetic energy of ball Q is larger than the kinetic energy of ball P.

[1]
b.

Calculate the energy in the kinetic store of ball Q.

[2]
c.

Ball Q enters the foam block and comes to rest. The foam block is compressed by the impact.

Describe the energy transfers that take place while ball Q is stopping.

[3]
Markscheme

3 Conservation of energy Questions

  1. GCSE
  2. /Physics
  3. /3 Conservation of energy

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