Two identical point masses are attached to a light rigid bar at positions and

PHYSICS · Subjective · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

Two identical point masses

m

are attached to a light rigid bar at positions

x = +0.20\,\text{m}

and

x = -0.20\,\text{m}

. Compare the rotational inertia about the following two axes, each perpendicular to the bar: (i) an axis through

x = 0

; (ii) an axis through

x = +0.20\,\text{m}

. Indicate which axis yields the smaller rotational inertia and give that value in terms of

m