Physics - Rotation Question with Solution | TestHub

A circular plate is rotating in horizontal plane, about an axis passing through its centre and perpendicular to the plate, with an angular velocity$\omega$. A person sits at the centre having two dumbbells in his hands. When he stretched out his hands, the moment of inertia of the system becomes triple. If$E$be the initial Kinetic energy of the system, then final Kinetic energy will be$\frac{E}{x}$. The value of$x$is