CONCEPT: ● Moment of inertia of a rigid body about a fixed axis is defined as the sum of the product of the masses of the particles constituting the body and the square of their respective distances from the axis of the rotation. ● The moment of inertia of a body is given by ⇒ I = m R2 Where m = Mass and R = Distance from the axis
The moment of inertia of a body about an axis parallel to the body passing through its center is equal to the sum of moment of inertia of the body about the axis passing through the center and product of the mass of the body times the square of the distance between the two axes. ⇒ I =Icm+md2