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A uniform metallic circurlar disc of mas...

A uniform metallic circurlar disc of mass M and radius R, mounted on frictionless bearings, is rotating at an angular speed `omega` about an axis passing through its centre and perpendicular to its plane. The temperature of the disc is then increased by `Deltat`. If `alpha` is the coefficient of linear expansion of the metal.

A

the moment of inertia increases by `MR^(2)alphaDeltat`

B

the moment of inertia remains unchanged

C

the angular velocity increases by `2alphaomegaDeltat`

D

the angular velocity decreases by `2alphaomegaDeltat`

Text Solution

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The correct Answer is:
A, D
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