In physics, angular momentum (less often moment of momentum or rotational momentum) is a physical quantity is a measure of the amount of rotational motion of an object, taking into account how fast a distribution of mass rotates about some axis. It is the rotational analog of linear momentum. For example, a conker twirling around on a short chord has a lower angular momentum compared to twirling a heavy sledgehammer at high speed. Increasing the length of chord, using a heavier conker, and angular speed of twirling, all increase the angular momentum of the conker. In principle, the conker and sledgehammer could have the same angular momentum, despite the differences in their masses and sizes.