JEE Main 2022PhysicsGravitationEasyMCQ

JEE Main 2022 — Gravitation Question with Solution

JEE Main 2022 (24 Jun Shift 1)

Question

The approximate height from the surface of earth at which the weight of the body becomes 13 of its weight on the surface of earth is :
[Radius of earth R=6400 km and 3=1.732]

Choose an option

Show full solutionCorrect option: B
Correct answer
B4685 km

Step-by-step explanation

The variation of the acceleration due to gravity with height h is given by,

g'=g1+hR2.

Since the weight at given height is 13 of the weight at the surface

⇒g'=g3⇒g1+hR2=g3⇒1+hR=3⇒h=R3-1=6400×1.732-1=4685 km

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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.