Research paper of physics 1401.
In physics there are numerous theories of gravitation which try to explain movement of bodies with a given mass. The theories explaining gravity are numerous from the antiquity period where Aristotle from Greece who stated that there was a cause to every form of motion and every downward motion was caused by a natural force that attracted objects towards the center. There was also the Greek physicist Archimedes who discovered the center of gravity of a triangle. In India Aryabhata was trying to explain the theory of geocentric as to why objects don’t spin out due to gravitational rotation. Some modern era gravitational theories include; newton’s theory of motion, mechanical explanations of gravitation, general relativity and gravity and quantum mechanics. Newton’s theory of gravitation discovered the inverse square law that forms a basis to Einstein’s theory of relativity.  The Einstein theory usually compare the effects of gravity to space time curvature instead of force and it has achievements such as perihelion possession, time delay of light and gravitational radiation. This paper evaluates the origin of gravitational acceleration.