
Whether torque is acting on ice skater. The cause of

Explanation of Solution
Introduction:
Torque:
Torque is a quantity which is used TO-DETERMINE how much a force will act on a body due to which body will start rotating.
Torque acting on ice skater will be zero. When ice skater pulls his arms in and raises them above his head, that time his arms become close to axis of rotation due to which his moment of inertia will get reduced but
Conclusion:Torque acting on ice skater will be zero. When ice skater pulls his arms in and raises them above his head, it will reduce his moment of inertia but angular momentum will remain same due to which angular velocity of ice skater will get increased.
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