| A | B |
|---|
| Work | The product of force and distance. |
| Joule | SI unit of Work |
| Power | The rate of doing work |
| Machine | Device that changes a force. |
| Work Input | The work done by the input force acting through the input distance. |
| Input Force | The force you exert on a machine. |
| Input Distance | The distance the input force acts through. |
| Output Force | The force that is exerted by a machine. |
| Output Distance | The distance th output force is exerted through. |
| Work Output | Output force multiplied by the output distance. |
| Mechanical Advantage | The number of times that the machine increases an input force. |
| Actual Mechanical Advantage | Equals the ratio of the output force to the input force. |
| Ideal mechanical advantage | The mechanical advantage in the absence of friction. |
| Lever | A rigid bar that is free to move around a fixed point. |
| Fulcrum | The fixed point the bar rotates around in a lever. |
| Input arm | The distance between the input force and the fulcrum. |
| Output arm | Distance between the output force and the fulcrum. |
| Wheel and Axle | A simple machine that consists of 2 disks or cylinders, each one with a different radius. |
| Inclined Plane | A slanted surface along which a force moves an object to a different elevation. |
| Wedge | A V-shaped object whose sides are 2 inclined planes sloped toward each other. |
| Screw | An inclined plane wrapped around a cylinder. |
| Pulley | A simple machine that consists of a rope that fits into a groove in a wheel. |
| Compound Machine | A combination of 2 or more simple machines that operate together. |
