When a body or a collection of particles is acted on by external forces, the center of mass moves as though all the mass were concentrated at that point and it were acted on by a net force equal to the sum of the external forces on the system.
Center of mass
Three coordinates of the center of mass
If the mass is continuously distributed
If the density is uniform
Centers of mass
Very often, center of mass can be determined according to the symmetry of the object.
is the density.
