JEE Main 2025 — Rotational Motion Question with Solution
From: JEE Main 2025 (Online) 7th April Morning Shift
Question
and C are disc, solid sphere and spherical shell respectively with same radii and masses. These masses are placed as shown in figure.

The moment of inertia of the given system about PQ axis is , where I is the moment of inertia of the disc about its diameter. The value of is ____________.
This question includes a diagram. The text above accompanies the figure.
Enter your answer
Show full solutionCorrect answer: 199
Step-by-step explanation

All bodies have same mass and same radius.
A Disc
B Solid sphere
Spherical shell
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Rotational Motion chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2025, 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.