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A solid sphere is rotating freely about ...

A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?

A

Rotational kinetic energy

B

Moment of inertia

C

Angular velocity

D

Angular momentum

Text Solution

Verified by Experts

The correct Answer is:
D
`tau_("ext") = 0`
`therefore (dL)/(dt) = 0 `
Hence , L = constant
`therefore` Angular momentum would remain constant for the sphere.
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