A man whose mass 50kg moves up 15 steps each of height 15cm in 45 seconds what is the power used in climbing those stairs
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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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