| A | B |
|---|
| energy | the ability to do work |
| joule | one newton-meter is equal to one of these |
| Law of Conservation of Energy | Energy in never created or detroyed |
| newton-meter | the combined units of force and distance used to quatify work |
| work | force time distance |
| in Physics, work is done by | forces |
| the work output of a simple machine can never exceed the work input | true |
| efficiency of a machine | ratio of work output to work input |
| ideal machine | 100% efficient |
| unit of power | watt |
