| A | B |
|---|
| compound machine | made of two or more simple machines |
| fulcrum | point on a lever around which the arm turns |
| joule | a unit of measuring work |
| lever | an arm that turns around a fixed point |
| mechanical advantage | amount that a machine increases the effort force |
| perpetual motion machine | vilates the law of conservation on energy |
| power | work per unit of time |
| watt | work being done at the rate of one joule per second |
| work | result of a force moving an object |
| efficiency | a measurement of the work put into a machine compared with the work the machine does |
