Changes

==Angular momentum==

==Angular momentum==

A rotating or orbiting body possesses angular momentum.  Like linear momentum, angular momentum is a vector quantity and is conserved.  An object's angular momentum changes only when a [[torque]] is applied to it. It is defined as:

A rotating or orbiting body possesses angular momentum.  Like linear momentum, angular momentum is a vector quantity and is [[Conservation of angular momentum|conserved]].  An object's angular momentum changes only when a [[torque]] is applied to it. It is defined as:

:<math>\vec{L} = \vec{r} \times \vec{p}</math>

:<math>\vec{L} = \vec{r} \times \vec{p}</math>