Physics (AS & A Level) · Oct / Nov 2022 · Paper 11 · Question 10

Two trolleys are held together on a horizontal surface with a compressed spring between them. When they are released, the trolleys lose contact with the spring. The trolley of mass 2 kg moves to the left at a final speed of 2 m s^-1. How much elastic potential energy was stored in the spring?

1. A4 J
2. B6 J
3. C8 J
4. D12 J

As printed in the paper