JEE Main 2019 — Rotational Motion Question with Solution
From: JEE Main 2019 (Online) 9th January Morning Slot
Question
If the angular momentum of a planet of mass m, moving around the Sun in a circular orbit is L, about the center of the Sun, its areal velocity is :
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
dA = r2d
. . . . . (1)
We know,
angular momentum,
L =
=
= mr2
= . . . . . (2)
Put value of in equation(1),
= ()
=
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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.