JEE Main 2021 — Rotational Motion Question with Solution
From: JEE Main 2021 (Online) 24th February Evening Shift
Question
A uniform thin bar of mass 6 kg and length 2.4 meter is bent to make an equilateral hexagon. The moment of inertia about an axis passing through the centre of mass and perpendicular to the plane of hexagon is _______ 101 kg m2.
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Show full solutionCorrect answer: 8
Correct answer
8
Step-by-step explanation
MOI of AB about
MOI of AB about O,
= 0.8 kgm2
= 8 101 kg-m2
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This is a previous-year question from JEE Main 2021, 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.