JEE Main 2020PhysicsRotational MotionMediumNumerical

JEE Main 2020 — Rotational Motion Question with Solution

JEE Main 2020 (03 Sep Shift 2)

Question

An massless equilateral triangle EFG of side 'a' (As shown in figure) has three particles of mass m situated at its vertices. The moment of inertia of the system about the line EX perpendicular to EG in the plane of EFG is N20ma2 where N is an integer. The value of N is ___________ .

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Show full solutionCorrect answer: 25
Correct answer
25

Step-by-step explanation

I=m×O2+ma2+ma22

=54ma2=2520ma2

N=25

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About this question

This is a previous-year question from JEE Main 2020, covering the Rotational Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.