Q.

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

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a

2ml2

b

3ml2

c

3ml2

d

ml2

answer is C.

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Detailed Solution

IXX′=m(DP)2+m(BQ)2+m(CA)2=m22l2+m22l2+m(2l)2=ml22+ml22+2ml2=3ml2
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