JEE Main 2012 — Gravitation Question with Solution
From: AIEEE 2012
Question
The mass of a spaceship is It is to be launched from the earth's surface out into free space. The value of and (radius of earth ) are and respectively. The required energy for this work will be:
Choose an option
Show full solutionCorrect option: D
Correct answer
D Joules
Step-by-step explanation
Potential energy at earth surface =
and at free space potential energy = 0
Work done for this = =
So the required energy for this work is
=
= [ as ]
=
Joules
and at free space potential energy = 0
Work done for this = =
So the required energy for this work is
=
= [ as ]
=
Joules
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This is a previous-year question from JEE Main 2012, 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.