Two winches, A and B

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

Problem

Two winches, A and B, each operate continuously at

20\,\text{kW}

. Winch A lifts a load at

0.50\,\text{m/s}

, while winch B lifts an identical load at

1.25\,\text{m/s}

. What is the ratio of the lifting force exerted by winch A to that exerted by winch B? (a)

0.4 : 1

(b)

1 : 1

(c)

2.5 : 1

(d)

4 : 1