Three particles each of mass `m` are palced at the corners of an equilateral triangle of side `b`. The gravitational potential energy of the system of particle is

Options

A. `(-3Gm^(2))/(2b)`
B. `(-Gm^(2))/(2b)`
C. `(-3Gm^(2))/b`
D. `(-Gm^(2))/b`

Answer

C

Explanation

`GPE(U)=(Gm_(1)m_(2))/(r_(12))`, Use, `U_("net")=U_(1)+U_(2)+U_(3)`