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An athlete mass 60 kg skips at the rete ...

An athlete mass `60 kg` skips at the rete of `20` steps per minute through an aberage height of `25 cm` . The power devolepment is:

A

`98 W`

B

`49 W`

C

`14 W`

D

`21 W`

Text Solution

Verified by Experts

The correct Answer is:
B
`W = mgh = 60 xx 9.8 xx(25//100) = 147 J`
Energy in one minute`= 147 xx 20 = 2950 J`
`P = (2490)/(60) = 49 W`
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