Question

Find the average horsepower, P =? required to raise a 150 kg drum to a height of 20 m in a time of 1 minute. SOLUTION: P = wk/t = mgH/t

Answer 1

Given:

$m=150\:\rm kg$

$h=20\:\rm m$

$t=1\rm \: min=60\: s$

The average power

$$P=\frac{W}{t}=\frac{mgh}{t}$$

$$P=\rm\frac{150*9.8*20}{60}=490\:W=0.657\; hp$$