5.3. The moment of inertia of the material point relative to a fixed axis of rotation

According to Newton's second law, for the tangential component of the force acting on a material point of mass m and acceleration

we can write

Given that

and

we have

Common and right parts on and get

(5.2)

or

The product of the mass of a material point body to the square of its distance before the axis of rotation is called the moment of inertia of the material point relative to the axis of rotation:

(5.3)