JEE Main 2019PhysicsGravitationEscape Speed And Motion Of SatellitesmediumMCQ

JEE Main 2019 — Gravitation Question with Solution

From: JEE Main 2019 (Online) 8th April Evening Slot

Question

A rocket has to be launched from earth in such a way that it never returns. If E is the minimum energy delivered by the rocket launcher, what should be the minimum energy that the launcher should have if the same rocket is to be launched from the surface of the moon ? Assume that the density of the earth and the moon are equal and that the earth's volume is 64 times the volume of the moon :-

Choose an option

Show full solutionCorrect option: B
Correct answer
BE/16

Step-by-step explanation

Minimum energy required (E) = – (Potential energy of object at surface of earth)



Now Mearth = 64 Mmoon



Re = 4Rm

Now

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About this question

This is a previous-year question from JEE Main 2019, 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.