Question

What is angular momentum?

Answer 1

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 `vecr`and its instantaneous linear momentum `vecp`

`vecL`= `vecr` `xx` `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`