Angular momentum in circular motion is the product of the linear momentum of the particle and the radius of rotation:
$$L = pR = mvR$$
where,
R— distance from the axis of rotation to the point where the force is applied (m);
p— momentum (N·s);
m— mass of the body (kg);
v— velocity (m/s).
Law of conservation of angular momentum
The law of conservation of angular momentum states that when there is no external torque present in the system, then its total angular momentum remains conserved.
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