A winch lifts a crate vertically upward at a constant average power output of

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

Problem

A winch lifts a

180\,\text{kg}

crate vertically upward at a constant average power output of

550\,\text{W}

. Approximately how many seconds are required to raise the crate

6.0\,\text{m}

? (Assume

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

.) (a)

12\,\text{s}

(b)

32\,\text{s}

(c)

19\,\text{s}

(d)

9.6\,\text{s}