| − | The creation of motion in the presence of an opposing force.<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref> | + | The creation of motion in the presence of an opposing force.<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref> Defined by the equation W = M - p(OF), where W is work, M is motion, and p, the presence, is a function of OF, the opposing force. The derivative of work yields momentum. |