A body will continue in a uniform motion in a straight line or remain at rest unless acted upon by an external force.
Every action has an equal and opposite reaction.
Keplers Law 1.Planets move in elliptical orbits with the sun as one of its focus. 3.The amount of time a planet takes to orbit the sun is related to its orbit size such that the period squared is proportional to the semi major axis cubed. Keplers Law link Keplers Law second link Keplers Law third link Keplers Law forth link Keplers Law fifth link Conservation of Energy Energy cannot be created or destroyed in any process. It only can be transformed from on form to another and can be transferred from one place to another. Ma Force is a push or a pull.