JEE Main 2021 — Rotational Motion Question with Solution
From: JEE Main 2021 (Online) 17th March Evening Shift
Question
A sphere of mass 2 kg and radius 0.5 m is rolling with an initial speed of 1 ms-1 goes up an inclined plane which makes an angle of 30 with the horizontal plane, without slipping. How long will the sphere take to return to the starting point A?
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: D
Correct answer
D0.57 s
Step-by-step explanation
a = 3.5 m/sec2
Time of accent
V = u + at
0 = 1 3.5 t
sec.
Time of decent
sec.
Total time = 0.57 sec.
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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.