Action: Forcing Energy to Predict Motion
Dwight E. Neuenschwander, Edwin F. Taylor, Slavomir Tuleja · The Physics Teacher · 2006
In this paper we use scalar energy, rather than vector force and momentum, to predict how a particle will move. The result is a quantity called action. Action and its relatives undergird Newton's laws and transcend them, also predicting motion in the quantum world and in the curved spacetime of general relativity. An example exhibits action in action.