Gravitation” modern physics tipler 5e solutions pdf “Law of Gravity” redirect here. File:Apollo 15 feather and hammer drop.
Gravity has an infinite range, although its effects become increasingly weaker on farther objects. As a consequence, it has no significant influence at the level of subatomic particles. 16th and early 17th centuries. Galileo showed that gravitational acceleration is the same for all objects.
Galileo’s work set the stage for the formulation of Newton’s theory of gravity. Newton’s theory because it is simpler to work with and it gives sufficiently accurate results for most applications involving sufficiently small masses, speeds and energies. Einstein, expresses the idea that all objects fall in the same way, and that the effects of gravity are indistinguishable from certain aspects of acceleration and deceleration. The simplest way to test the weak equivalence principle is to drop two objects of different masses or compositions in a vacuum and see whether they hit the ground at the same time. More sophisticated tests use a torsion balance of a type invented by Eötvös. The outcome of any local non-gravitational experiment in a freely falling laboratory is independent of the velocity of the laboratory and its location in spacetime.