Physics (AS & A Level) · May / June 2022 · Paper 11 · Question 19

Two wires, P and Q, are made from the same metal and hang vertically from a steel girder. Wire Q has half the length and twice the diameter of wire P. Identical masses are attached to the bottom of each wire. Both wires obey Hooke's law as they are stretched by the weight of the masses. What is the ratio extension of wire P / extension of wire Q?

1. A8/1
2. B4/1
3. C1/1
4. D1/2

As printed in the paper