Angular momentum is the rotational counterpart of linear momentum. Any massive object that rotates about an axis carries angular momentum, including rotating flywheels, planets, and so on. Like with l...Angular momentum is the rotational counterpart of linear momentum. Any massive object that rotates about an axis carries angular momentum, including rotating flywheels, planets, and so on. Like with linear momentum, a system's total angular momentum is conserved in the absence of external torques. The conservation of angular momentum states that the angular velocity of a rigid body is inversely proportional to its moment of inertia.
