JEE Main 2019 — Rotational Motion Question with Solution
From: JEE Main 2019 (Online) 9th January Evening Slot
Question
A rod of length 50 cm is pivoted at one end. It is raised such that if makes an angle of 30o from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s1) will be (g = 10 ms2)
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
When this rod move from initial position to final position then,
Gain in kinetic energy = loss in potential energy
2 = mgh
2 = mg
2 =
=
=
= rad/sec
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This is a previous-year question from JEE Main 2019, 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.