| A | B |
|---|
| Machine | device that allows you to do work in a way that is easier or more effective. |
| Simple Machine | a simple device without moving parts that changes the size or direction of a force |
| Compound Machine | A device that combines two or more simple machines. |
| Mechanical Advantage | The number of times a machine increases a force exerted on it. The ratio of output force to input force |
| Power | the rate at which work is done equals the amount of work done on an object in a unit of time (rate = time) |
| Input Force | the force that must be applied to a machine by the user. |
| Output Force | The force the machine exerts on an object. |
| Output Work | The work done by a machine as the output force acts through the output distance. The output force is the force of the shovel, the output distance is how far the shovel moves. |
| Efficiency | The percentage of the input work that is converted to output work. The higher the percent, the more efficient the machine is. |
| Fulcrum | The fixed point around which a lever pivots. |
