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CBSE Class 9 Answered

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:
Asked by Amithjose | 19 Oct, 2012, 10:09: PM
answered-by-expert Expert Answer
energy consumed in one jump = mgH = 45*(10)(1/3) = 150 J
totla energy consumed in a min = 1500J
thus power = 1500/60 = 25W
Answered by | 19 Oct, 2012, 10:47: PM

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