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A man is riding on a cycle with velocity...

A man is riding on a cycle with velocity `7.2(km)/(hr)` up a hill having a slope 1 in 20. The total mass of the man and cycle is 100kg. The power of the man is

A

200 W

B

175 W

C

125 W

D

98 W

Text Solution

Verified by Experts

[4]

`v=7.2km//h =7.2xx(5)/(18)=2m//s`
slope is given 1 in 20
`sin theta=(1)/(20)`
`rArrF=mg sin theta`
So power of the man p `=Fxxv=mg sin theta xxv`
`=100 xx9.8xx(1)/(20)xx2`
`=98` Watt
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