Physics (AS & A Level) · Oct / Nov 2024 · Paper 13 · Question 23

A rubber cord hangs from a rigid support. A weight attached to its lower end is gradually increased from zero, and then gradually reduced to zero. The force–extension curve for contraction is below the force–extension curve for stretching. What does the shaded area between the curves represent?

1. Athe elastic potential energy stored in the rubber cord
2. Bthe thermal energy dissipated in the rubber cord
3. Cthe work done by the rubber cord during contraction
4. Dthe work done on the rubber cord during stretching

As printed in the paper