| A | B |
|---|
| work | is done when an applied force cause an object to move in the direction of the force |
| unit of measure for work | joule |
| unit of measure for force | newton |
| unit of work for distance | meter |
| power | how quickly work is done |
| unit of measure for power | watt |
| input force | the force that you apply on a machine |
| output force | the force that the machine applies |
| mechanical advantage | ratio of output force to input force |
| efficiency | ratio of output work to input work |
| simple machine | a machine that only does one movement |
| compound machine | a machine made up of a combination of simple machines |
| inclined plane | a flat sloped surface |
| wedge | inclined plane that moves |
| screw | an inclined plane wrapped around a cylinder |
| lever | a rod or plank that pivots or rotates around a point |
| wheel and axle | two circular objects that are of different size that are attached so they rotate together |
| pulley | a grooved wheel with a rope or cable wrapped over it |
