A-LevelPhysicsDeformation of solids9702/12 · Oct/Nov 2025 · Q221 Mark
A copper wire has length 1.7 m and uniform diameter 0.64 mm. The Young modulus of copper is 1.2 × 10¹¹ Pa. What is the spring constant of the wire?
A2.3 × 10⁴ Nm⁻¹
B9.1 × 10⁴ Nm⁻¹
C4.5 × 10⁷ Nm⁻¹
D7.1 × 10⁷ Nm⁻¹
✓ Correct answer
A: 2.3 × 10⁴ Nm⁻¹
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