Moment of Inertia formula:

**I = m × r ^{2}**

where:

The moment of inertia calculates the rotational inertia of an object rotating around a given axis. It represents how difficult it overcomed to change its angular motion about that axis. Moment of inertia of a same object will change against different axis. The more far away from the axis, the more moment of inertia the object has.