Steps to find moment of inertia of a point mass.
The moment of inertia of point mass m at a distance r from the axis of rotation is given by I = mr2. A point mass does not have a moment of inertia around its own axis, but using the parallel axis theorem a moment of inertia around a distant axis of rotation is achieved.
Let us learn here how to find moment of inertia of a point mass (m) at a distance (r) rotating around its own axis.
Moment of inertia of point mass I = mr2
m = Mass
r = Radius
Step 1: Assume that the point mass of an object is 20kg at distance 5cm
Step 2: Applying values in the formula,
Moment of inertia of point mass I = m x r2
I = 20 x 52
I = 20 x 25
I = 500
Moment of Inertia of a Point Mass Calculation using this online Calculator