Question

Rotating annular disc is heated what happens to angular momentum and angular velocity

Answer 1

Explanation:

As torque is to force, moment of inertia is to mass. When temperature is changed, what changes is the moment of inertia, which causes a corresponding change in the angular velocity. Objects expand when heated (e.g. a metal disc). This increases their moment of inertia, and hence, decreases the angular velocity.

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Answer 2

The angular momentum  and angular velocity will be increase and decrease.

Explanation:

Angular momentum :

Angular momentum is equal to the product of moment of inertia and angular velocity.

In mathematically,

$L=I\times \omega$

Angular velocity :

Angular velocity is equal to the position of angle divided by time.

In mathemetically,

$\omega=\dfrac{\theta}{t}$

If rotating annular disc is heated then,

When object heats then the volume of disc will increase radius also increase.

It measns moment of inertia will be increase of disc but angular velocity will be minimum change compare to initial angular velocity.

Hence, The angular momentum  and angular velocity will be increase and decrease.

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Topic : angular momentum

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