| A | B |
|---|
| compound machines | combination of 2 or more simple machines |
| simple machines | there are 6 of them |
| lever | free to move about the fulcrum |
| wedge | moving inclined plane |
| screw | inclined plane wrapped around a cylinder |
| inclined plane | slanted surface used to raise an object |
| pulley | chain,belt, or rope around a wheel |
| wheel and axle | lever that rotates in a circle |
| fulcrum | fixed point of the pivot |
| effort arm | distance from effort force to fulcrum |
| resistance arm | distance from resistance force to fulcrum |
| mechanical advantage | effort arm/resistance arm |
| machines | makes work easier |
| effort force | force applied to a machine |
| work input | work performed on a machine |
| work output | work performed by a machine |
