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 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 . The radius of the sphere is increased keeping its mass same . Which of the following physical quantities would remain constant for the sphere ?
Answer» Angular VELOCITY Moment of inertia Rotational kinetic ENERGY Angular MOMENTUM Solution :As there is no external torque acting on a SPHERE , i.e., `tau_("ex") = 0` So, `(dL)/(dt) = tau_("ex") = 0` i.e., L = constant So angular momentum REMAINS constant .