question_answer

Three particles of equal mass m are situated at the vertices of an equilateral triangle of side l. What should be the velocity of each particle, so that they move on a circular path without changing l?

A) \[\sqrt{\frac{Gm}{2l}}\]                         

B) \[\sqrt{\frac{Gm}{l}}\]

C) \[\sqrt{\frac{2Gm}{l}}\]             

D) \[\sqrt{\frac{2Gm}{3l}}\]