| VOCAB | DEFINITION |
| INERTIA | the tendency of a resting body to remain at rest |
| FORCE | push or pull on an object |
| WORK | whenever a force is acts upon a body, work is done |
| ENERGY | may be defined as the ability to do work |
| KINETIC ENERGY | the energy of a moving body |
| POTENTIAL ENERGY | stored energy, energy at rest |
| LAW of CONSERVATION of ENERGY | changes forms, and cannot be created nor destroyed |
| EINSTEIN'S THEORY of RELATIVITY | energy = mass x speed of light in air or vacuum squared (E = mc*) |
| ELECTRIC MOTOR | converts electrical energy to mechanical energy |
| BATTERY | converts chemical energy to electrical energy |
| STEAM ENGINE | converts heats energy to mechanical energy |
| GASOLINE ENGINE | converts chemical to mechanical energy |
