https://www.khanacademy.org/science/ap-physics-c-mechanics/x077f5683c1428fac:linear-momentum/x077f5683c1428fac:center-of-mass/a/what-is-center-of-mass 2026-05-01T14:10:52.97313295Z Learn and try: Systems and center of mass Learn how to calculate the position of a system's center of mass. Explore how the motion of a system's center of mass is related to conservation of momentum. article https://www.khanacademy.org/science/ap-physics-c-mechanics/x077f5683c1428fac:linear-momentum/x077f5683c1428fac:center-of-mass/e/center-of-mass-exercises-ap1 2026-06-19T17:56:42.733541135Z Systems and center of mass Practice predicting motion using a system's center of mass in this set of free practice questions. April Russell exercise