| A | B |
|---|
| work | force X distance |
| machine | increases input effort |
| force | a push or a pull |
| input force | force YOU exert |
| output force | force exerted by the machine |
| mechanical advantage | # of times multiplies effort |
| efficiency | the % of input work converted to output work |
| simple machine | 6 basic kinds of machines |
| inclined plane | ramp; flat slanted surface |
| wedge | inclined plane that moves |
| screw | inclined plane wrapped around a cylinder |
| lever | rigid bar that rotates on a fulcrum |
| 1st class lever | F between E and L |
| 2nd class lever | L between F and E |
| 3rd class lever | E between L and F |
| wheel & axle | 2 circular objects fastened together and rotate about a common axis |
| pulley | grooved wheel with a rope wrapped around it |
| compound machine | machine that utilizes 2 or more simple machines |
