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A long wire hangs vertically with its up...

A long wire hangs vertically with its upper end clamped, when a torque of 4.5 Nm is applied to free end through an angle of `10^(@)`. Then work done by the twisted wire is,

A

`pi//4J`

B

`22.5 J`

C

`pi//2J`

D

`pi//8J`

Text Solution

Verified by Experts

The correct Answer is:
D
`omega =(1)/(2) tau theta =(1)/(2) xx (4.5xx10pi)/(180)=(pi)/(8)`
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