JEE Main 2026 — Gravitation Question with Solution
JEE Main 2026 (24 January Shift 1)
Question
Three masses and 400 kg are placed at the vertices of an equilateral triangle with sides 20 m. They are rearranged on the vertices of a bigger triangle of side 25 m and with the same centre. The work done in this process J. (Gravitational constant )
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Work done equals negative change in gravitational potential energy.
For three masses in an equilateral triangle, gravitational PE is .
Initial configuration (side 20 m):
Final configuration (side 25 m):
Work done:
J J
For three masses in an equilateral triangle, gravitational PE is .
Initial configuration (side 20 m):
Final configuration (side 25 m):
Work done:
J J
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This is a previous-year question from JEE Main 2026, 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.