JEE Main · PhysicsHard
Three particles of mass are placed at the vertices of an equilateral triangle of side length . A fourth particle of mass is placed at the centroid of the triangle. What is the gravitational potential energy of the system?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: C —
Solution
The total potential energy . . The distance from the centroid to each vertex is . Thus, . Summing these gives .
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