Moment of inertia is a physical property of an object that describes its resistance to rotational motion. It is a measure of how difficult it is to change an object's rotational speed.
Moment of inertia is calculated by multiplying the mass of an object by the square of its distance from the axis of rotation. This distance is also known as the radius of gyration.
Moment of inertia and mass are two different physical properties of an object. Mass refers to the amount of matter in an object, while moment of inertia describes the distribution of mass around an axis of rotation.
Moment of inertia is important because it helps us understand how objects will rotate when subjected to external forces. It also plays a crucial role in many engineering and physics applications, such as calculating the stability of structures and predicting the motion of objects.
Moment of inertia is affected by both the shape and mass distribution of an object. Objects with a larger mass and more spread out mass distribution will have a higher moment of inertia, making it more difficult to change their rotational motion.