JEE Main 2021PhysicsRotational MotionMediumMCQ

JEE Main 2021 — Rotational Motion Question with Solution

JEE Main 2021 (26 Feb Shift 1)

Question

Four identical solid spheres each of mass m and radius a are placed with their centres on the four corners of a square of side b. The moment of inertia of the system about one side of square where the axis of rotation is parallel to the plane of the square is :

Choose an option

Show full solutionCorrect option: C
Correct answer
C85ma2+2mb2

Step-by-step explanation

I=2×25ma2+2×25ma2+mb2

I=85ma2+2mb2

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About this question

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.