| A | B |
|---|
| machine | a device that makes work easier |
| simple machine | a device that does work with only one movement |
| effort force | the force applied TO the machine |
| resistance force | the force applied BY the machine |
| ideal machine | work input equals work output |
| mechanical advantage | the number of times a machine multiplies the effort force |
| lever | a bar that is free to pivot, or turn, about a fixed point |
| fulcrum | the fixed point of a lever |
| effort arm | the part of the lever on which he effort force is applied |
| resistance arm | the part of the lever that exerts the resistance force |
| pulley | a groove whell with a rope or a chain |
| wheel and axle | consists of two wheels of different sizes that rotate together |
| inclined plane | the ramp would make your job easier |
| screw | an nclined wedge wrapped in a spiral |
| wedge | an inclined plane with one or two sloping sides |
| bionics | the science of designing artificial replacements |
| compound machine | a combination of two or more simple machines |
| efficiency | a measure of how much of the work put into a machine is changed to useful work |
| power | the rate at which work is done |
