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

A solid sphere is rotating freely about its symmetry axis in free spac

1.	A solid sphere is rotating freely about its symmetry axis in free space. Ther adius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
Answer» ANGULAR momentum Angular velocity ROTATIONAL kinetic energy Moment of inertia Solution :There is no external torque on the ROTATING sphere, hence its angular moment REMAINS constant. (From conservation law of angular momentum).