Physics (AS & A Level) · May / June 2017 · Paper 11 · Question 18

A mass is raised vertically. In time t, the increase in its gravitational potential energy is Eₚ and the increase in its kinetic energy is Eₖ. What is the average power input to the mass?

1. A(Eₚ – Eₖ)t
2. B(Eₚ + Eₖ)t
3. C\frac{E_p - E_k}{t}
4. D\frac{E_p + E_k}{t}

As printed in the paper