Mass Moment of Inertia

Mass moment of inertia is a physical property that measures how difficult it is to change the rotational motion of an object around a specific axis. It depends on how the object's mass is distributed relative to that axis; the farther the mass is from the axis, the greater the inertia. Essentially, it quantifies an object's resistance to spinning faster or slowing down. Think of it as rotational mass—like how a heavy door swings more slowly than a light one, due to the distribution of weight impacting the effort needed to rotate it.