JEE Main 2024 — Rotational Motion Question with Solution
JEE Main 2024 (06 Apr Shift 2)
Question
Three balls of masses and respectively are arranged at centre of the edges of an equilateral triangle of side . The moment of intertia of the system about an axis through the centroid and perpendicular to the plane of triangle, will be _______ .
Enter your answer
Show full solutionCorrect answer: 4
Correct answer
4
Step-by-step explanation
Moment of inertia about and perpendicular to the plane is : $\begin{aligned} \mathrm{I} & =\mathrm{r}^2[2+4+6] \\ & =\frac{1}{3} \times 12 \\ \mathrm{I} & =4 \mathrm{~kg}-\mathrm{m}^2 \end{aligned}$
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 2024, 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.