a man of mass 62 kg climbs up a stair case of 65 steps in 12 s. If height of each step is 20 cm, find his power
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Mass, m = 62 kg
No. of steps = 65 with height of each = 20 cm = 0.2 m
Total height, h = 65*0.2 = 13 m
Time taken, t = 12 s
Work done = Potential energy = mgh (where m is mass, g is 10(acceleration) and h is height)
⇒ Work done = Potential energy = 62*10*13 = 8060 Joule
Power = Work done/ Time taken
= 8060/12
= 671.7 Watt (W)
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