How to calculate the moment of inertia of two point masses
The moment of inertia of two point masses object, M and m, separated by a distance x about an axis passing through the center of mass of the system and perpendicular to line joining the two particles is given by I = (Mm/M+m)x2.
Let us learn here how to calculate the moment of inertia of two point masses 'M' and 'm' separated by a distance x.
Moment of Inertia of Two Point Masses I = (Mm / M+m)x2
M, m = Two Point Masses
x = Distance
Step 1: Assume that object of masses M and m be 20kg and 15kg respectively, separated by a distance x of 5cm.
Step 2: Applying the values in the formula,
Moment of Inertia (I) of Two Point Masses,
I = (Mm / M+m)x2
I = [(20x15) / (20+15)] x 52
I = (300 / 35) x 25
I = 214.28