Four identical electric motors raise a load through

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Four identical electric motors raise a

100\,\text{N}

load through

2\,\text{m}

. The times taken are: Motor P —

4\,\text{s}

, Q —

6\,\text{s}

, R —

4\,\text{s}

, S —

8\,\text{s}

. Which pair of motors develops equal power? (a) P and Q (b) Q and S (c) P and R (d) Q and R