Q.

A square is made by joining four rods each of mass M and length L. Its moment of inertia about an axis PQ, in its plane and passing through one of its corner is

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a

6ML2

b

43ML2

c

83ML2

d

103ML2

answer is C.

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Detailed Solution

I=Icm+Mtotr2 =4ML23sin2450+4ML22  =83ML2
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A square is made by joining four rods each of mass M and length L. Its moment of inertia about an axis PQ, in its plane and passing through one of its corner is