Question

A gymnast takes turns with her arms & legs stretched. When
she pulls her arms & legs in
(a) the angular velocity decreases
(b) the moment of inertia decreases
(c) the angular velocity stays constant
(d) the angular momentum increases

Answer 1

moment of inertia decreases

Explanation:

Explanation: Since no external torque action gymnast, so angular momentum (L = Iω) is conserved. After pulling her arms & legs, the angular velocity increases but moment of inertia of gymnast, decreases in, such a way that angular momentum remains constant.Jun 26, 2019