

The expression for the location of the center of mass (COM) of a system of two particles can be calculated using their masses and positions. Let's denote the masses of the particles as �1m1 and �2m2, and their positions as �1r1 and �2r2, respectively.
The position vector of the center of mass, �COMRCOM, is given by:
�COM=�1�1+�2�2�1+�2RCOM=m1+m2m1r1+m2r2
