Power required by a boy of mass 30000g to run up staircase of 40 steps in 10 sec is ( height of each step is 15 cm)(take g = 10 m/s^2)
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m=30kg
d= 40steps
height of each step= 15cm
total height H= 40*15= 600cm= 6m
g=10m/sec2
w= mgH
w= 30*10*6=1800 jule
power P = w/t
P= 1800/10= 180 W
P= 180 W
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