A uniform metallic disc of radius r and ...

A uniform metallic disc of radius r and mass m is spinning with angular speed `omega_(0)` about an axis passing through its centre and perpendicular to plane. If its temperature is increased (slightly) by `DeltaT` its new angular speed is (The coefficient of linear expansion of the metal is `alpha`)

`omega_(0)(1+2alphaDeltaT)`

`omega_(0)(1+alphaDeltaT)`

`omega_(0)(1-2alphaDeltaT)`

`omega_(0)(1-3alphaDeltaT)`

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