A crane lifts a load vertically through in

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

Problem

A crane lifts a

1200\,\text{kg}

load vertically through

15\,\text{m}

20\,\text{s}

. Take

g=9.8\,\text{m\,s}^{-2}

. Neglecting losses, the average power developed by the crane engine is closest to (a)

12.1\,\text{hp}

(b)

11.8\,\text{hp}

(c)

8.8\,\text{hp}

(d)

15.8\,\text{hp}