Question:medium
A thin rod of length ' $4L$ ' and mass ' $4m$ ' is bent as shown. Find the moment of inertia about an axis through $O$ and perpendicular to the plane.
A thin rod of length ' $4L$ ' and mass ' $4m$ ' is bent as shown. Find the moment of inertia about an axis through $O$ and perpendicular to the plane.
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Shortcut:
Divide bent rod into straight segments and apply parallel axis theorem carefully.
Updated On: May 8, 2026
- $\frac{mL^2}{3}$
- $\frac{10mL^2}{3}$
- $\frac{mL^2}{12}$
- $\frac{mL^2}{24}$
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The Correct Option is B
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