Time Line Project
By: Salwa Omar
Kepler proved the the orbital path of the planets were ellipses (not perfect circles). He proved that when a planet is closer to the sun its orbital path is faster then ones farther away from the sun and slower. His research provided a complete Kinematic observation on motion of planets .
Isaac Newton realized that the falling motion of an apple and the motion of the moon were the same motion with the same force and gravitational force acting on it . He stated that the universal force acting between two thing/objects was gravity. The gravitational force would equal the objects weight. Where g = 9.8 m/s2. The reason the moon orbits the Earth is it gravitational force. The Universal Gravitation is often called an Inverse Square Law.