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Physics (AS & A Level) · May / June 2026 · Paper 14 · Question 21

9702Elastic and plastic behaviour

A wire is extended by different forces. The wire obeys Hooke's law. A graph is plotted to show the variation of a quantity y with a quantity x. What could quantities x and y represent?

  1. Aelastic potential energy / extension
  2. Bextension / force
  3. Cforce / extension
  4. Dextension / elastic potential energy

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Correct answer: A. elastic potential energy / extension

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