Let the mass moment of inertia of differential mass about 0 – 0 axis be dm as shown in Fig. P-8.1.

If it is perpendicular to plane of rotation of centre of mass, then it can be written as,

dI = r^{2} dm

or,

I = ^{2} dm

Where,

I = Mass Moment of Inertia

Keeping the mass density, p as constant, then we get-

dm = p dV

where,

dV = Element of Volume

Hence, from Fig. P-8.1,

I = ^{2}p dV

= P^{2} dV

**Links of Previous Main Topic:-**

- Introduction to statics
- Introduction to vector algebra
- Two dimensional force systems
- Introduction concept of equilibrium of rigid body
- Friction introduction
- Introduction about distributed forces
- Area moments of inertia in rectangular and polar coordinates

**Links of Next Mechanical Engineering Topics:-**