JEE Main 2021PhysicsRotational MotionMediumNumerical

JEE Main 2021 — Rotational Motion Question with Solution

JEE Main 2021 (20 Jul Shift 2)

Question

A body rotating with an angular speed of 600 rpm is uniformly accelerated to 1800 rpm in 10 sec. The number of rotations made in the process is

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Show full solutionCorrect answer: 200
Correct answer
200

Step-by-step explanation

ωf=ω0+αt

α=1200×6

θ=ω0t+12αt2

=600×1060+12×1200×6×136

θ=200

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About this question

This is a previous-year question from JEE Main 2021, 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.