We can summarize this important result as follow: The overall translation/ motion of a system of particles can be analyze using Newton's law as if the mass were concentrated at the center of mass and the total external force were applied at that point.” These are general results that apply equally well to a solid objectWe can summarize this important result as follow: “The overall translational motion of a system of particles can be analyze using Newton’s law as if the mass were concentrated at the center of mass and the total external force were applied at that point.” These are general results that apply equally well to a solid object