JEE Main 2018 — Rotational Motion Question with Solution
From: JEE Main 2018 (Online) 15th April Evening Slot
Question
A thin rod MN, free to rotate in the vertical plane aboutthe fixed end N, is held horizontal. When the end M is released the speed of this end, when the rod makes an angle with the horizontal, will be proportional to : (see figure)
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
When the end M is released and rod makes angle with horizontal, the displacement of centre of mass is .
Now, we know
Here, ; therefore,
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This is a previous-year question from JEE Main 2018, 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.