Physics | MHT CET 2018 | Discussion Page

Loading [MathJax]/jax/output/HTML-CSS/jax.js

Asquare frame ABCD is formed by four identical rods each of mass m and length l, This frame is in

XY- plane such that side AB coincides with X-axis and side AD along Y- axis. The moment of inertia of the frame about X-axis is

$\frac{5ml^{2}}{3}$

$\frac{2ml^{2}}{3}$

$\frac{4ml^{2}}{3}$

$\frac{ml^{2}}{12}$

Option A

In the given figure,

$l=l_{AB}+l_{BC}+l_{CD}+l_{DA}=0+\frac{ml^{2}}{3}+ml^{2}+\frac{ml^{2}}{3}$

or $l=\frac{5ml^{2}}{3}$

Discussion Forum