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 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
Explanation:
r = l/√2 + l/2√2 = 3l√2
I = 2I₁ + 2I₂
= 2(I₁ + I₂)
=2[ML²/3 sin²45° + ([ML²/12 sin²45° Mr² )]
= 8/3ML²
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