Two heavy particles having masses ` m_(1) & m_(2)` are situated in a plane perpendicular to line AB at a distance of `r_(1) and r_(2)` respectively .
What is the moment of inertia of the stystem about axis AB ?

Explanation

Moment of inertia of particle on left is `I_1 = m_1 r_1^2`. Moment of Inertia of particle on right is `I_2 = m_2 r_2^2`. Moment of Inertia of the system about AB is `I = I_2 + I_2 = m_1 r_1^2 + m_2 r_2^2`