The angular momentum of a system of particles is not conserved when
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Solution
Angular momentum:
It is equal to the product of the angular velocity of the body or system and its moment of inertia with respect to the rotation axis.
It is a vector quantity which is a measure of the rotational momentum of a rotating body or system.
SI Unit of angular momentum
Mathematical expression for angular momentum:
Mathematically ,
Or , Where = change of angular momentum, = net torque, = time interval,
It is evident from the above-listed formula that the change in angular momentum is proportional to the average net torque and the time interval the torque is applied.
Hence, , When , Then constant, i.e. is not conserved.
Thus, The angular momentum of a system of particles is not conserved when external torque acts on the system.