Four particles having masses, m, 2m, 3m, and 4m are placed at the four corners of a square of edge a. Find the gravitational force acting on a particle of mass m placed at the centre.

Options

A. `(24m^(2)G)/(a^(2))`
B. `(6m^(2)G)/(a^(2))`
C. `(4sqrt(2)"Gm"^(2))/(a^(2))`
D. zero

Answer

C