Question

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
pls help me with brief explanation.. ​

Answer 1

Answer:

If the radius of the sphere is increased keeping mass same which one of the following with not be affected ? Solution : (a) As no external torque is acting on the sphere hence angular momentum of the sphere will be constant.

Explanation:

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