Physics (AS & A Level) · May / June 2017 · Paper 12 · Question 19

A cable on a suspension bridge supports a weight of 19.3 × 10^5 N. This weight causes the cable to stretch by 47 mm. A lorry crossing the bridge then increases the force on the cable to 23.3 × 10^5 N. The force-extension graph for the cable is shown. What is the increase in strain energy in the cable when the lorry is crossing the bridge?

1. A21 kJ
2. B23 kJ
3. C45 kJ
4. D66 kJ

As printed in the paper