Question

A man of mass 62kg climbs up a stair case of 65 steps in 12s.if height of each step is 20cm,find his power

Answer 1

Hey!

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Mass of man = 62 kg
Number of steps = 65
Time taken = 12 s
Height of each step = 20 cm
Gravity due to Acceleration = 10 m/s^2

Total height of all steps = 65×20=1300 cm =13m

Power = mgh/t
Power = 62×10×13/12
Power = 671.6 W

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Hope it helps...!!!

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Answer 2

Hi friend---------------Your answer---------------------
Mass = m = 62 kg
Number of steps = 65
Time = t = 12 seconds 
Height of each step = 20 cm
Total height climbed by the person = (65 × 20)/100 m = 13 m
So,-------
Power = p = work done (w)/ Time taken (t)
P = w/t
P = mgh/t. [ Because w = mgh]
P = (62×10×13)/12
P = 671.66 Watt
HOPE IT HELPS