Review equilibrium and inertia according to Aristotle's theory regarding natural motion and violent motion. Using the cup and coin to demonstrate rest motion and to show that the coin possess inertia, then removal of the index card holding the coin above the card to verify Aristotle's theory of natural motion, the coin moving downward. The first statement of Newton's first law was written as "objects at rest tend to remain at rest, a force is needed to change that state of motion. A dynamics cart with a block "doll" sitting in it was used to demonstrate that once in motion, the object will continue to move in a straight line at constant speed until a force is applied to stop it. The moving cart hit a stationary block, stopped, but the doll continued to move forward in a straight line. It was repeated using a rubber band to stimulate a seat belt in a car, and the result recorded. Both the first and second statements were combined into a single "Newton's first law".