A student sits on a freely rotating stool holding dumbbells, each of mass `5.0 kg` (Fig). When his
Channel: Doubtnut
Date: 2020-01-19

A student sits on a freely rotating stool holding dumbbells, each of mass `5.0 kg` (Fig). When his arms are extended horizontally (Fig a), the dumbbells are `1.0 m` from the axis of rotation and the student rotate with an angular speed of `1.0 rad//s`. The moment of inertia of the student plus stool is `5.0 kg.m^2` and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position `0.50 m` from the rotationa are (Fig.) The new angular speed of the student is. .