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Physics (AS & A Level) · May / June 2024 · Paper 11 · Question 23

9702Elastic and plastic behaviour

For a wire, Hooke's law is obeyed for a tension F and extension x. The Young modulus for the material of the wire is E. Which expression represents the elastic potential energy stored in the wire?

  1. A\frac{1}{2}Ex
  2. BEx
  3. C\frac{1}{2}Fx
  4. DFx

As printed in the paper

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Correct answer: C. \frac{1}{2}Fx

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