Physics

Problem

Three identical point masses

m

are placed at the vertices of an equilateral triangle of side

a

. What is the gravitational potential energy of this system? a)

-\dfrac{G m^{2}}{a}

\dfrac{3 G m^{2}}{a}

-\dfrac{3 G m^{2}}{a}

-\dfrac{3 G m^{2}}{2 a}