What is angular momentum?

1 Answer
Apr 16, 2018

Angular momentum is the rotational analogue of the Linear momentum.

Explanation:

Angular momentum is denoted by vecL.

Definition :-

The instantaneous angular momentum vecL of the particle relative to the origin O is defined as the cross product of the particle’s instantaneous position vector vecrand its instantaneous linear momentum vecp

vecL = vecrxx vecp

For a rigid body having fixed axis rotation , the angular momentum is given as vecL=Ivecomega ; where I is the Moment of Inertia of the body about the axis of rotation.

The net torque vectau acting on a body is give as the rate of change of Angular Momentum.

:. sumvectau = (dvecL)/dt

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