A body of mass 60 kg runs up a staircase of 50 steps in 10 seconds. if the height of each step is 15 cm. find his power (take g = 10 m/s^2)
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s = 7.5m
m = 60 kg
t = 10sec.
power = (60x7.5)÷10 = 4.5 Joule
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