System Of Particles And Rotational Motion Ques 5

5. Three particles, each of mass $\mathrm{m}$ gram, are situated at the vertices of an equilateral triangle $A B C$ of side $l \mathrm{cm}$ (as shown in the figure). The moment of inertia of the system about a line $A X$ perpendicular to $\mathrm{A} B$ and in the plane of $A B C$, in gram- $\mathrm{cm}^2$ units will be

[Image]

$[2004]$

(a) $\frac{3}{2} $ $m \ell^2$

(b) $\frac{3}{4} $ $m \ell^2$

(c) $2 $ $m \ell^2$

(d) $\frac{5}{4}$ $ m \ell^2$