| A | B |
|---|
| machine | device that makes work easier |
| simple machine | device that does work with one movement |
| effort force | force applied to the machine |
| resistance force | force applied by the machine |
| ideal machine | work in put equals work output |
| MA | the number of times a machine multiplies the effort force |
| lever | bar that is free to pivot or turn around a fixed point |
| fulcrum | the fixed point of the lever |
| resistance arm | part of the lever that exerts the resistance |
| effort arm | part of the lever where the the effort force is applied |
| pulley | grooved wheel with a rope or a chain running along the groove |
| wheel and axle | two wheels of different sizes that rotate together |
| inclined plane | sloping surface used to raise objects |
| screw | inclined plane wrapped in a spiral around a cylindrical post |
| wedge | one or two sloping sides |
| bionics | science of designing artificial replacements for parts of the human body |
| compound machine | two or more simple machines combined |
| efficiency | measure of how much of the work put into a machine is changed to useful work output |
| power | rate at which work is done |
| watts | unit for power |
