Question

Two identical rods $PQ$ and $RS$ each of length $L$ and mass $M$ are joined to form a T-shaped frame as shown in figure. The moment of inertia of given arrangement about an axis passing through $PQ$ is

• A. $M{L}^2$
• B. $\frac{4M{L}^2}{3}$
• C. $\frac{2}{5}M{L}^2$
• D. $\frac{M{L}^2}{3}$

Answer 1

The correct option is D $\frac{M{L}^2}{3}$

Answer (2)
$I_{PQ}=\frac{M{L}^2}{3}+0=\frac{M{L}^2}{3}$