A circus acrobat while performing spins brings his limbs closer to the body. Due to this

Angular Momentum is conserved and also K.E. is conserved

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Angular Momentum is not conserved but K.E. is conserved

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Angular Momentum is not conserved and also K.E. is not conserved

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Angular Momentum is conserved but K.E. is not conserved

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Solution

The correct option is D
Angular Momentum is conserved but K.E. is not conserved

A circus acrobat while performing spins brings his limbs closer to the body. Due to this Angular Momentum is conserved but K.E. is not conserved. Because when the moment of inertia decreases, rotational kinetic energy increases as work is done in decreasing the moment of inertia of the body.

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