A-LevelPhysicsDeformation of solids9702/12 · Oct/Nov 2024 · Q211 Mark
Four solid steel rods equally support an object weighing 10 kN. Each rod is of length 2.0 m and cross-sectional area 250 mm². The weight of the object causes the rods to contract by 0.10 mm. The rods obey Hooke's law. What is the Young modulus of steel?
A2.0 × 10⁸ Nm⁻²
B2.0 × 10¹¹ Nm⁻²
C8.0 × 10⁸ Nm⁻²
D8.0 × 10¹¹ Nm⁻²
✓ Correct answer
B: 2.0 × 10¹¹ Nm⁻²
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