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System of Particles and Rotational Motion
  1. A boy suddenly comes and sits on a circular rotating table. What will remain conserved?
    1. Angular velocity
    2. Angular momentum
    3. Linear momentum
    4. Kinetic energy
Correct Option: B

As net torque applied is zero. Hence,

τ =
dL
Dt

dL
 = θ, L = constant.
Dt

L (angular momentum) remains conserved.


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