Three equal mass m are placed at the three vertices of an equilateral triangle of side a. The gravitational force exerted by this system on another particle of mass m placed at the mid-point of a side

Options

A. `(Gm^(2))/(3a^(2))`
B. `(4Gm^(2))/(3a^(2))`
C. `(Gm^(2))/(a^(2))`
D. `(Gm^(2))/(3a^(2))`

Answer

B