Abstract
Innovation of dynamics is presented directly based on the principle of energy conservation, in order to make it possible to construct the virtual product used on design and development process in various mechanical makers. First, in addition to the conventional causality, that is force causes motion, the inverse causality, that is motion causes force, is introduced into the new dynamics for explaining closed causality of physical phenomena Second, static and dynamic functions of mass and compliance are defined, and it is made evident that mass and compliance are in counter pair each other. Third, the three new laws are proposed, which are in counter pairs of Newton's three laws. Forth, new definition of work is presented which is done by action of velocity to compliance. Two phenomena of collision and connection are compared each other as an example of symmetrical relation of physical laws.
