Gravitation

A system consists of three particles each of mass '\(m_1\)' placed at the corners of an equilateral triangle of side '\(\frac{\mathrm{L}}{3}\)', A particle of mass '\(\mathrm{m}_2\)' is placed at the mid point of any one side of the triangle. Due to the system of particles, the force acting on \(\mathrm{m}_2\) is