JEE Main 2017 — Rotational Motion Question with Solution
JEE Main 2017 (08 Apr Online)
Question
Moment of inertia of an equilateral triangular lamina , about the axis passing through its centre and perpendicular to its plane is as shown in the figure. A cavity is cut out from the lamina, where are the mid points of the sides. Moment of inertia of the remaining part of lamina about the same axis is:
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Given,
Moment of inertia of a triangular lamina
,
Moment of inertia of
.
Moment of inertia of the remaining part
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 2017, 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.