JEE Main 2021 — Rotational Motion Question with Solution
From: JEE Main 2021 (Online) 25th July Morning Shift
Question
A particle of mass 'm' is moving in time 't' on a trajectory given by
Where and are dimensional constants.
The angular momentum of the particle becomes the same as it was for t = 0 at time t = ____________ seconds.
Where and are dimensional constants.
The angular momentum of the particle becomes the same as it was for t = 0 at time t = ____________ seconds.
Enter your answer
Show full solutionCorrect answer: 10
Correct answer
10
Step-by-step explanation
At t = 0,
t 2 (t 5) = 0
t = 10 sec
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 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.