| A | B |
|---|
| work | transfer of energy that occurs when a force makes an object move |
| screw | an inclined plane wrapped around a post |
| mechanical advantage | number of times a machine multiplies the input force |
| input force | force you apply to a machine |
| output force | force exerted by a machine to move the weight of the object |
| simple machine | machine which uses only one movement |
| compound machine | a combination of simple machines |
| lever | a rod or plank that pivots about a fixed point |
| wedge | a moving inclined plane with one or two sloping sides |
| machine | device that makes doing work easier |
| inclined plane | a sloped surface, sometimes called a ramp |
| pulley | an object, like a wheel, that has a groove with a rope or cable running through it |
| wheel & axle | two round objects that are attached and rotate together about the same axis |
| ideal machine | machine in which there is no friction |
