Question

A man whose mass is 50kg climbs up 30 steps of a stair in 30 s . If each step is 20cm high, calculate the power used in climbing the stairs. [Take g= 10 m/ s

Answer 1

Answer:

P=100W

Explanation:

Let the work done be W and power be P

then, W=mgh

where m=50kg

g=10ms^-2

for height h=20/100 *30

=6m

then W=50*10*6J

W=3000J

since P=W/t

where W=3000J

and t=30s

P=3000/30

P=100W