A-LevelPhysicsDeformation of solids9702/12 · Oct/Nov 2015 · Q211 Mark

A force acts on a wire to produce extension e. The same force then acts on a second wire of the same material, but of half the diameter and three times the length of the first wire. Both wires obey Hooke's law. What is the extension of the second wire?

A3e

B4e

C6e

D12e

✓ Correct answer

D: 12e

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Topic: Deformation of solids, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2015 Paper 1 Variant 2, question 21.

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