Question
Fri October 19, 2012 By: Amithjose
 

A girl weighing 45 kg jumps to a height of (1/3) m at the rate 10 times per minute. The power at which she is spending the energy is:

Expert Reply
Fri October 19, 2012
energy consumed in one jump = mgH = 45*(10)(1/3) = 150 J
totla energy consumed in a min = 1500J
thus power = 1500/60 = 25W
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