| A | B |
|---|
| work | when a force causes an object to move in the same direction the force was applied |
| power | how quickly work is done |
| input force | the force that you apply on a machine |
| output force | the force that the machine applies |
| mechanical advantage | the number of times a machine increases the input force |
| efficiency | ratio of output work to input work |
| simple machine | a machine that does work with only one movement |
| compound machine | a machine made up of a combination of simple machines |
| inclined plane | a flat sloped surface |
| wedge | an inclined plane that moves |
| screw | an inclined plane wrapped around a cylinder or post |
| lever | a rigid rod or plank that pivots or rotates around a point |
| wheel and axle | 2 circular objects of different size that are attached in a way for rotation |
| pulley | a grooved wheel with a rope wrapped over it |
