May/June 2026 Paper 13

2026 · 40 questions · 40 parts · 40 marks

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21Elasticity Hookes Law Young ModulusHard1 mark
Two springs X and Y are attached to a fixed surface. Blocks are attached to their free ends. The blocks hang vertically in equilibrium from the springs as shown.
spring X and spring Y both hanging from a fixed horizontal support; spring X (left) has its unstretched length l marked and an extension of 0.20l marked below it down to a block labelled m; spring Y (right), shown more tightly coiled, hangs to the same total length as spring X, with an unlabelled block at its lower end
The stretched lengths of X and Y are equal.
Spring X has spring constant k, unstretched length l and extension 0.20l.
Spring Y has spring constant 3.0k and extension 0.10l.
The mass of the block attached to spring X is m.
What is the mass of the block attached to spring Y?