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Consider a ligh rod with two heavy mass ...

Consider a ligh rod with two heavy mass prticles at its ends. Let AB be as line perpendicular to the rod s shown in figure. What is the moment of inertya of the system about AB?

Text Solution

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Moment of inertia of the particle on the left is `m_1r_1^2`
Moment of inertia of the particle on the right is `m_2r_2^2`. Moment of inertia of the rod is negligible as the rod is light.
Thus the moment of inertia of the system about AB is
`m_1r_1^2+m_2r_2^2`
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