| A | B |
|---|
| work | the result when a force causes an object to move |
| machine | a device that changes the amount of force applied to an object, the of force, or both |
| lever | a simple machine having an arm that moves about a fixed point |
| fulcrum | the fixed point on a lever |
| effort arm | the part of a lever on which a person or another machine applies a force |
| resistance arm | the part of a lever that applies a force on an object |
| pulley | a wheel that has a groove along its edge |
| wheel and axle | a simple machine that has a central pivot around which a wheel moves |
