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  4. In a rectangle ABCD text (BC=2AB), the moment of inertia along axis will be minimum through

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Q. In a rectangle $ ABCD\text{ }(BC=2AB), $ the moment of inertia along axis will be minimum throughPhysics Question Image

ManipalManipal 2011System of Particles and Rotational Motion

Solution:

For a rectangular lamina, moment of inertia about a time passing through centre and parallel to longer side is minimum. Hence, momentum of inertia about EG will be minimum.