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A body of mass 10 kg moves with a consta...

A body of mass 10 kg moves with a constant speed v of 2 `ms^(-1)` along a circular path of radius 8 m. The power produced by the body will be

A

10 `Js^(-1)`

B

98 `Js^(-1)`

C

49 `Js^(-1)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
(d) Power is defined as the rate of change of energy in a system or the time rate of doing work.
`rArr" "P=(dE)/(dt)=(dW)/(dt)` Also, work `="force"xx"displacement" =Fxxd`
Since, the displacement is zero,
so, `" "P=(d)/(dt)(Fxxd)=(d)/(dt)xx0=0`
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