ABSTRACT
If the object is rotated about a different axis or if the mass is redistributed then the moment of inertia changes (as the distance of r will change).
The moment of inertia is different for different body shapes and unless a defined axis of rotation is identified, the moment of inertia has little meaning. Generally the moment of inertia is defined by an axis passing through the center of gravity of the object (ICofG) and this provides a reference value for the object from which further calculations can be made. This would be necessary, for example, when there is a change in the axis of rotation from the center of gravity to, say, some other point such as the end of an object (e.g., the handle of a racket or the end of a body segment such as the shank). For a more thorough understanding of this concept the reader is referred to section C3.
