question_answer

Four particles each of mass M, are located at the vertices of a square with side L. The gravitational potential due to this at the centre of the square is:

A)  \[-\sqrt{32}\frac{GM}{L}\]         

B)         \[-\sqrt{64}\frac{GM}{{{L}^{2}}}\]

C)  zero                     

D)         \[\sqrt{32}\frac{GM}{L}\]

E)  \[8\frac{GM}{{{L}^{2}}}\]