JEE Main 2020 — Rotational Motion Question with Solution
From: JEE Main 2020 (Online) 9th January Morning Slot
Question
Three solid spheres each of mass m and
diameter d are stuck together such that the lines
connecting the centres form an equilateral
triangle of side of length d. The ratio I0/IA of
moment of inertia I0 of the system about an axis
passing the centroid and about center of any
of the spheres IA and perpendicular to the plane
of the triangle is :This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
AB = d
OA =
From parallel axis theorem
I0 = =
IA = I0 + 3M
= + Md2
=
=
OA =
From parallel axis theorem
I0 = =
IA = I0 + 3M
= + Md2
=
=
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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.