| A | B |
|---|
| Fulcrum | fixed support around which the bar turns |
| Load | weight of object being moved (resistance) |
| Effort | force needed to move load |
| First Class Lever | L - F - E |
| Second Class Lever | F - L - E |
| Third Class Lever | F - E - L |
| Pulley | a wheel with a groove, and in the groove there a belt / rope |
| Types of pulleys | Movable and Fixed |
| Fixed Pulley | attached to stationary object, change direction of effort, pull down |
| Movable Pulley | attached to load, doesn't change direction of effort, uses less effort to lift load |
| Ex. of 1st Class Lever | seesaw |
| Ex. of 2nd Class Lever | wheelbarrow |
| Ex. of 3rd Class Lever | tennis racket |
| Pulling Downwards is... | easier than lifting upwards |
| Fixed Pulleys are... | a type of turning 1st class lever |
| Ex. of Fixed Pulley | louvered blinds and curtains |
| Simple machines have... | few or no moving parts and do work with one movement |
| A machine... | changes size, direction, or speed of force |
| Ex. of Simple machine | Pulleys and Levers and Screws |
| uhmmmmm = | uhmmmmm |
