Verified Solution • 2025–26 Session moderate

QAIPMT-2004-Ph-2639: NEET 2004 Physics - Class 11 AIPMT-2004-Ph-2639 Solution: Three particles, each of mass m gram, are situated at the…

Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side l cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-cm

^2

units will be

Multiple Choice Options

A $\frac{3}{4}ml^2$
B $2ml^2$
C $\frac{5}{4}ml^2$
D $\frac{3}{2}ml^2$

Step-by-Step Verified Solution

I AX = m(AB) 2 + m(OC) 2 = m l 2 + m ( l cos 60�) 2 = m l 2 + m l 2 /4 = 5/4 m l 2

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