| A | B |
|---|
| lever | a bar that is free to turn or pivot on a fixed point |
| fulcrum | the fixed point where a lever pivots |
| inclined plane | sloping surface used to raise objects |
| screw | inclined plane wrapped in a spiral |
| wheel and axle | 2 wheels of different sizes that rotate together |
| pulley | a grooved wheel with a rope or chain running along the groove |
| wedge | an inclined plane that moves through the object |
| resistance | object that you are trying to move |
| formula for finding the effort force | resistance/IMA |
| IMA of a lever | effort arm/resistance arm |
| IMA of a wheel and axle | radius of large wheel /radius of small |
| IMA of an inclined plane | length of slope/height |
| IMA of a pulley | # of supporting ropes |
| block and tackle | system of fixed and movable pulleys |
| IMA of a single fixed pulley | one |
| IMA of a single movable pulley | two |
| work | force x distance |
| force | work/distance |
| distance | work/force |
| joule | unit for work |
| ideal machine | a machine without friction |
| friction | a force that opposes motion |
| gear | a wheel with teeth |
| first class lever | the fulcrum lies between the resistance and effort |
| third class lever | the effort lies between the resistance and fulcrum |
| second class lever | the resistance lies between the fulcrum and effort |
| effort arm | distance from fulcrum to effort |
| resistance arm | distance from fulcrum to resistance |
| force | a push or pull |
| newton | unit for force |
| meter | unit for distance |
| effort force | force applied to the machine |
| resistance force | force applied by the machine to the resistance |
| mechanical advantage | the number of times a machine multiplies the effort force |
