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  • How to solve this problem- A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which one of the following will not be affected?

A solid sphere is rotating in free space. If the radius  of the sphere is increased keeping mass same which   one of the following will not be affected?

Option 1)

moment of inertia

 Option 2)

angular momentum
Option 3)

angular velocity

 Option 4)

rotational kinetic energy

Answers (1)

best_answer

As we learnt in

Law of conservation of angular moment -

\vec{\tau }= \frac{\vec{dL}}

- wherein

If net torque is zero

i.e. \frac{\vec{dL}}= 0

\vec{L}= constant

angular momentum is conserved only when external torque is zero .

 

 Angular momentum remains constant

i.e. \vec{\tau_{ext}}=0


Option 1)

moment of inertia

This is an incorrect option.

Option 2)

angular momentum

This is the correct option.

Option 3)

angular velocity

This is an incorrect option.

Option 4)

rotational kinetic energy

This is an incorrect option.

Posted by

Aadil

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