The center of mass of a system of particles is a weighted average, according to the individual mass, of the positions of all the particles that compose it. For a particle system we have:xcg = ((x1 * m1) + (x2 * m2) + ... + (xn * mn)) / (m1 + m2 + .... + mn)ycg = ((y1 * m1) + (y2 * m2) + ... + (yn * mn)) / (m1 + m2 + .... + mn)The coins can be taken as particle systems.Note: it is important to define the origin of the coordinate system to calculate the center of mass of a particle system.
