The yo-yo continues turning in the same direction due to its rotational momentum.

Combined with the rotational angular momentum of the nuclei , we have .

The spin involves rotating like a discus thrower and using rotational momentum for power.

The rotational momentum is now transferred through the arm joints.

Rotating tethers can also be used to slow down incoming spacecraft, thus increasing the rotational momentum.

The rise of the water to the top and its rotational momentum is produced by hydroulic force drive by an electrical pump.

The Earth rotates eastward, so the water possesses that rotational momentum.

To conserve its rotational momentum, the further the current travels north the faster it must move eastward.

These equations describe all rotational momentum in terms of the principal axes:

The rotational angular momentum of the Earth decreases and consequently the length of the day increases.