Q. 104.3( 3 Votes )

A weightlifter lifts 240 kg from the ground to a height of 2.5 in 3 second. The average power is :
A. 1960 W

B. 19.6 KW

C. 1.96 MW

D. 196 W

Answer :

Given,

Mass = 240 kg


Height = 2.5 m


Time = 3 s


Let g = 9.8 ms-2


We know,



Energy consumed = m × g × h


= 240 kg×9.8 ms-2×2.5 m


= 5880 J


Substituting the require values



= 1960 W

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