Momentum and CollisionHard

Question

Four point masses, of a value m are placed at the corners of a square ABCD of side l.The moment of interia of this system about an axis passing through A and parallel to BD is

Options

A.2ml2
B.√3ml2
C.3ml2
D.ml2

Solution

       
Inn′ = 2 × m + m(√21)2
= ml2 + 2ml2 = 3ml2

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