| A | B |
|---|
| lever | Bar that is free to pivot about a fixed point |
| wedge | An inclined plane with one or two sloping sides |
| pulley | Grooved wheel with a rope running along the grove |
| wheel and axle | Two wheels of different sizes that rotate together |
| inlined plane | Sloping surfaced used to raise objects |
| gear | Wheel with teeth along its circumference |
| screw | Inclined plane wrapped in a spiral around a cylindrical post |
| work | W=FxD |
