JEE Main 2022PhysicsRotational MotionEasyMCQ

JEE Main 2022 — Rotational Motion Question with Solution

JEE Main 2022 (24 Jun Shift 2)

Question

A fly wheel is accelerated uniformly from rest and rotates through 5rad in the first second. The angle rotated by the fly wheel in the next second, will be :

Choose an option

Show full solutionCorrect option: B
Correct answer
B15rad

Step-by-step explanation

Here the angular acceleration is constant, so we have,

θ=ωt+12αt2.

When flywheel is rotated from rest in the first second, then θ1=12α12=5 rad 

⇒α=10 rad s-2

The angle turned by flywheel in the next second is θ2=12α22=12104=20 rad s-2

Thus, the angle turned during next second is θ=20-5=15 rad

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About this question

This is a previous-year question from JEE Main 2022, 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.