Question

Three identical particles each of mass $"m"$ are arranged at the corners of an equilateral triangle of side $"L"$. If they are to be in equilibrium, the speed with which they must revolve under the influence of one another's gravity in a circular orbit circumscribing the triangle is

• A. $\sqrt{\frac{3Gm}{L}}$
• B. $\sqrt{\frac{Gm}{L}}$
• C. $\sqrt{\frac{Gm}{3L}}$
• D. $\sqrt{\frac{3Gm}{L^2}}$

Answer 1

Answer: (B)