• # question_answer A gymnast takes turns with her arms and legs stretched. When she pulls her arms and legs A)  the angular velocity decreasesB)  the moment of inertia decreases  C)  the angular velocity stays constantD)  the angular momentum increases

Solution :

Since no external torque act on gymnast, so angular momentum (L= Iw) 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.

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