Physics (AS & A Level) · May / June 2020 · Paper 12 · Question 18

An elastic cord of unstretched total length 16.0 cm and cross-sectional area 2.0 × 10⁻⁶ m² is held horizontally by two smooth pins a distance 8.0 cm apart. The cord obeys Hooke's law. A load of mass 0.40 kg is suspended centrally on the cord. The angle between the two sides of the cord supporting the load is 60°. What is the Young modulus of the cord material?

1. A5.7 × 10⁵ Pa
2. B1.1 × 10⁶ Pa
3. C2.3 × 10⁶ Pa
4. D3.9 × 10⁶ Pa

As printed in the paper