| A | B |
|---|
| lever | a bar that turns against an unmoving point |
| inclined plane | a flat surface with one end higher than the other |
| screw | a bar that has an inclined plane wrapped around it |
| wedge | a double inclined plane that can split objects apart |
| wheel and axle | a large outer wheel attached to a smaller wheel called an axle |
| pulley | a grooved wheel with a cable or rope running through the groove |
| work | using force to move an object over a distance |
| simple machine | device used to make work easier |
