In this section, it is illustrated the angular momentum and its conservation when a rod turns with a given angular velocity with respect to a given axis. The rod has a total mass , length , and moment of inertia with respect to the center of mass .
In resume, for the rod rotating with constant angular velocity around an axis crossing through the center of mass, the angular momentum is conserved independent of the selected point for calculating the angular momentum and torque. On the other side, when the rotation of the rod is around an axis not going through the center of mass, the angular momentum is conserved only when calculated through a point at the axis of rotation.

