JEE Main 2022PhysicsGravitationEasyMCQ

JEE Main 2022 — Gravitation Question with Solution

JEE Main 2022 (29 Jun Shift 1)

Question

The escape velocity of a body on a planet A is 12 km s-1. The escape velocity of the body on another planet B, whose density is four times and radius is half of the planet A, is 

Choose an option

Show full solutionCorrect option: A
Correct answer
A12 km s-1

Step-by-step explanation

We know that escape velocity is given by,

v=2GMR⇒vAvB=MAMB×RBRA=ρARA3ρBRB3×RBRA=ρARA2ρBRB2=14×41⇒vB=vA=12 km s-1

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About this question

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