Four point masses each of mass 'm' are placed on the corner of square of side 'a' Calculate magnitude of gravitational force experienced each particle
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Four particles of masses m, 2m, 3m and 4m are placed at the four corners of a square of side a. Find the gravitational force on a particle of mass m placed at the centre of the square.

As shown in figure , four masses each of mass 3sqrt2 kg at the corners of a square of side 3 m . Calculate the gravitational potential energy of system of these four particles. Also calculate the gravitational potential at the centre of square. (G = 6.67 x 10^(-11) SI unit)