Physics (AS & A Level) · May / June 2019 · Paper 13 · Question 19

Four solid steel rods, each of length 2.0 m and cross-sectional area 250 mm², equally support an object weighing 10 kN. 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?

1. A2.0 × 10⁸ N m⁻²
2. B2.0 × 10¹¹ N m⁻²
3. C8.0 × 10⁸ N m⁻²
4. D8.0 × 10¹¹ N m⁻²

As printed in the paper