| A | B |
|---|
| Lever | allow us to move things more easily by magnifying our efforts |
| Fulcrum | point on which the lever balances or pivots |
| Load | weight or resistance that needs to be overcome |
| Effort | the force you apply to the lever |
| Class One Lever | where fulcrum is positioned between the effort and the load; examples: seesaw, old fashioned scale |
| Force | distance & effort are interrelated; if you're willing to increase the distance over which you exert force, you can decrease the force and still get work done |
| Class Two Lever | fulcrum is at one end with the effort applied at the other end with the load in between; example: wheelbarrel |
| Class Three Lever | fulcrum is at one end with the load at the other and effort in between; example: tweezers, your arm |
