JEE Main 2021 — Gravitation Question with Solution
From: JEE Main 2021 (Online) 16th March Morning Shift
Question
The maximum and minimum distances of a comet from the Sun are 1.6 1012 m and 8.0 1010 m respectively. If the speed of the comet at the nearest point is 6 104 ms1, the speed at the farthest point is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A3.0 103 m/s
Step-by-step explanation
v1 = 6 104 m/s
Let point 1 is nearest point,
and point 2 is farthest point.
Given, r1 = 8 1010 m & r2 = 1.6 1012 m
By angular momentum conservation
L1 = L2
mr1v1 = mr2v2
v2 =
v2 =
v2 = 3.0 103 m/s
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This is a previous-year question from JEE Main 2021, covering the Gravitation 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.