Find the potential energy of a system of four particles each of mass 2m kept at the vertices of a square of side x. Also find the potential at the centr of the square.

Find the potential energy of a system of four particles each of mass m placed at the vertices of a square of side I .

Find the potential energy of a system of four particles each of mass m place at the vertices of a square fo side l. Also obtain the potential at the centre of the square.

Find the potential energy of a sytem of four particle each of mass 5 kg placed at the vertices of a square of side 2m.