If angular momentum is conserved in a system whose moment of inertia is decreased, will rotational kinetic energy be conserved.
If angular momentum is conserved in a system whose moment of inertia is decreased, will rotational kinetic energy be conserved.
A. angular momentum is conserved
B. linear momentum is conserved
C. energy is conserved
D. angular momentum is not conserved
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Correct Answer - A
Torque, `tau =(dL)/(dt)`
where, L = angular momentum
If `tau =0`,
then `(d L)/(dt)=0`
i.e. L = constant
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