JEE Main 2021 — Gravitation Question with Solution
From: JEE Main 2021 (Online) 16th March Evening Shift
Question
If one wants to remove all the mass of the earth to infinity in order to break it up completely.
The amount of energy that needs to be supplied will be where x is __________ (Round off to the Nearest Integer) (M is the mass of earth, R is the radius of earth, G is the gravitational constant)
The amount of energy that needs to be supplied will be where x is __________ (Round off to the Nearest Integer) (M is the mass of earth, R is the radius of earth, G is the gravitational constant)
Enter your answer
Show full solutionCorrect answer: 3
Correct answer
3
Step-by-step explanation
We know that binding energy of earth,
Energy required to break the earth into pieces
...... (i)
According to question, the amount of energy that needs to be supplied is .
Comparing it with value in Eq. (i), we get,
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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.