| A | B |
|---|
| motion | movement; the act of going from one place to another |
| force | strength or energy that moves an object or holds it in place |
| work | the act of using force to move something over a certain distance |
| simple machines | have few or no moving parts |
| wedge | an axe and a knife are examples of |
| inclined plane | an example is a ramp |
| screw | an inclined plane wrapped around a rod |
| lever | consists of a board and a fulcrum |
| fulcrum | the point which a lever pivots around |
| wheel and axle | reduces friction making it easier to move something |
| gear | a wheel with teeth |
| pulley | used to lift heavy objects |
| wedge | used to split things apart |
| screw | used to hold things together |
| complex machine | made up of two or more simple machines |
| mass and distance | the two factors which determine how much work it takes to do something |
