| A | B |
|---|
| Lever | A beam used to move a load |
| Lever Arm | A beam, free to pivot around a point |
| Fulcrum | The point at which the lever arm moves |
| Load | the weight or resistance that is moved using a simple machine |
| Effort | The force applied to move a load using a simple machine |
| Newtons | The metric unit used to measure force |
| Advantage | A gain in effort or distance or a change of direction |
| FLE-123 | A memory trick to help remember how to identify the class of lever (what's in the middle - F=1, L=2, E=3) |
| Class-one lever | Fulcrum is in the middle |
| Class-two lever | Load is in the middle |
| Class-three lever | Effort is in the middle |
| Scissors, tin snips, crowbars | Examples of class-one levers |
| Bottle opener, nutcracker, paper cutter | Examples of class-two levers |
| Ice tongs, Baseball bats, golf clubs | Examples of class-three levers |
