Physics (AS & A Level) · May / June 2024 · Paper 13 · Question 21

A wire is fixed at one end and is extended by a force F1 acting on the other end. This causes the wire to have an elastic potential energy of 0.15 J. The force applied to the wire is now changed to a force F2. This causes the wire to have a new elastic potential energy of 0.60 J. The wire obeys Hooke's law. What is the relationship between F1 and F2?

1. AF1 = 2F2
2. BF1 = 4F2
3. C2F1 = F2
4. D4F1 = F2

As printed in the paper