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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" rad"//s`. The moment of inertia of the wheel about the axis of rotation is

A

0.6 kg `xx "metre"^(2)`

B

0.15 kg `xx "metre"^(2)`

C

0.8kg `xx "metre"^(2)`

D

0.75 kg `xx "metre"^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`K.E. = (1//2) Iomega^(2) = (1//2)I xx 30^(2) 360`,
`I = 0.8 kgm^(2)`
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