A-LevelPhysicsDeformation of solids9702/12 · May/June 2019 · Q201 Mark

A wire X is stretched by a force and gains elastic potential energy E. The same force is applied to wire Y of the same material, with the same initial length but twice the diameter of wire X. Both wires obey Hooke's law. What is the gain in elastic potential energy of wire Y?

A0.25E

B0.5E

C2E

D4E

✓ Correct answer

A: 0.25E

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Topic: Deformation of solids, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 20.

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