Changes

The angular momentum of a point mass about a point is defined as <math>\vec H = \vec r \times \vec p</math> where '''r''' is the position [[vector quantity|vector]] of the point mass with respect to the point of reference and '''p''' is the [[momentum|linear momentum]] vector of the point mass.

The '''angular momentum''' of a point mass about a point is defined as <math>\vec H = \vec r \times \vec p</math> where '''r''' is the position [[vector quantity|vector]] of the point mass with respect to the point of reference and '''p''' is the [[momentum|linear momentum]] vector of the point mass.

The principle of angular momentum can be applied to a system of particles by summing the angular momentum of each particle about the same point.

The principle of angular momentum can be applied to a system of particles by summing the angular momentum of each particle about the same point.