| A | B |
|---|
| lever | a rigid bar that rests on a fulcrum that allows you to lift heavy loads or change the direction of a force |
| fulcrum | the pivot point |
| work | using force to move an object through a distance |
| simple machines | decvices with few moving parts that make work easier to do |
| effort arm | the part of a lever you apply an input effort force to |
| resistance arm | the part of the lever which produces an output force to the lift load |
| wheel and axle | a large-diameter wheel rotates on a circle around a small-diameter axle |
| pulley | a wheel with a groove in the rim. A rope fits into the groove. |
| inclined plane | a flat, slanted surface that makes it easier to move heavy objects to higher levels |
| wedges | an inclined plane that is used as a tool for cutting or separating things |
| screws | an inclined plane wrapped in a spiral cylinder or cone |
