May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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19Elasticity Hookes Law Young ModulusMedium1 mark
An initially unstretched spring is stretched within its limit of proportionality to a length of 80 mm. The work done stretching the spring is 0.010 J. The spring constant of the spring is 22.5 N m. What is the unstretched length of the spring?