- Angular momentum is the rotational equivalent of linear momentum.
It is defined in a similar way, using the rotational analogs
to mass and velocity:
ang mom L = (moment of inertia) * (angular velocity)

- For one object orbiting another under the influence of gravity,
**I = m*r^2**and**omega = v/r**, soang mom L = I * omega = (m * r^2) * (v/r) = m * v * r

- The total angular momentum of a system is conserved, as long as no external forces act on it.

Copyright © Michael Richmond. This work is licensed under a Creative Commons License.