Physics (AS & A Level) · Oct / Nov 2020 · Paper 11 · Question 15

A trolley runs from P to Q along a track. At Q its potential energy is 50 kJ less than at P. At P, the kinetic energy of the trolley is 5 kJ. Between P and Q, the trolley does 10 kJ of work against friction. What is the kinetic energy of the trolley at Q?

1. A35 kJ
2. B45 kJ
3. C55 kJ
4. D65 kJ

As printed in the paper