Q.
A $T$ joint is formed by two identical rods $A$ and $B\ $each of mass $m$ and length $L$ in the $XY$ plane as shown. Its moment of inertia about axis coinciding with $A$ is
A) $\frac{{2\ mL\ }^{2}}{3}$
B) $\frac{{mL\ }^{2}}{12}$
C) $\frac{{mL\ }^{2}}{6}$
D) None of these
Explanation
(c) $I = I_{x} + I_{y} = \frac{mL^{2}}{12} + \frac{mL^{2}}{12} = \frac{mL^{2}}{6}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.