Rewrite of the article   I have decided to insert a version of the equivalence principle article The   main goal is to have an article that is in conformance with the wikipedia article on gravity A lot of what I write is derived from that article The basis of the equivalence principle is Einsteins  vision that gravitational interaction is mediated by changing the rate of time by curving spacetime geometry Then and only then can the effects of acceleration cancel the effects of gravitation Everything else follows from that Every interaction has a mediator In the case of gravitation curvature of spacetime is that mediator