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A flywheel rotating about a fixed axis h...

A flywheel rotating about a fixed axis has a kinetic energy of `360J` when its angular speed is `30` radian `s^(-1)` . The moment of inertia of the wheel about the axis of rotation is

A

`"0.6 kg m"^(2)`

B

`"0.4 kg m"^(2)`

C

`"0.8 kg m"^(2)`

D

`"0.55 kg m"^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`E=(1)/(2)Iomega^(2)`
`therefore" "360=(1)/(2)Ixx(30)^(2)`
`therefore" "I=(720)/(900)="0.8 kg m"^(2)`
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