Question

A man whose mass is 50 kg moves up 15 steps each of height 15 cm in 45 seconds of time. Calculate the power used in climbing those stairs. (g = 10 m/s2)

Answer 1

Answer:

m= 50kg

d= 15 step

height of each step =15cm

total height = 15*15= 225cm = 2.25m

g= 10 m/sec2

w=mgh

w= 50*10*2.25= 1125 jule

P= w/t

P= 1125/45=25 W

P= 25W

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