Laws of motion Various theories in physics In physics, a number of noted theories of the motion of objects have developed. Among the best known are: Classical mechanics Newton's laws of motion Euler's laws of motion Cauchy's equations of motion Kepler's laws of planetary motion General relativity Special relativity Quantum mechanics Index of articles associated with the same name This article includes a list of related items that share the same name (or similar names). If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.