JEE Main 2020 — Rotational Motion Question with Solution
From: JEE Main 2020 (Online) 3rd September Evening Slot
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 ma2
where N is an integer. The value of N is _____.
This question includes a diagram. The text above accompanies the figure.
Enter your answer
Show full solutionCorrect answer: 25
Correct answer
25
Step-by-step explanation
I = m2 + =
Accoeding to the question,
N = 25
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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.