| A | B |
| work | transfer of energy thatoccurs when force makes object move |
| machine | device that changes force or increased motion from work |
| simple machine | machine that does work with only one movement |
| compound machine | combination of 2 or more simple machines |
| efficiency | ratio of outut to input work |
| mechanical advantage | ratio of output to input force |
| force | push or pull exerted on object |
| work equals | force x distance |
| joules equals | Newtons x m |