| A | B |
|---|
| bionics | Science of designing artificial replacement parts for the human body |
| compound machine | Combination of two or more simple machines |
| efficiency | ratio of work output to work input to a machine |
| effort arm | Part of a lever on which an effort force is applied |
| effort force | Force applied to a machine when a machine is used to do work |
| fulcrum | Fixed point around which a lever pivots |
| ideal machine | Machine in which work input equals work output; no friction |
| inclined plane | Simple machine consisting of a sloping surface used to raise objects |
| lever | Simple machine consisting of a bar that is free to pivot around a fixed point |
| machine | Device that makes work easier by changing the size of the forc applied to it |
| mechanical advantage | Number of times a machine multiplies the effort force applied to it |
| power | Measure of the amount of work done in a specific amount of time |
| pulley | Simple machine consisting of a grooved wheel with a rope or a chain running along the groove |
| resistance arm | Part of a lever that exerts the resistnace force |
| resistance force | Force exerted by a machine to overcome resistance to gravity or friction |
| screw | Simple machine consisting of an inclined plane wrapped around a cylindrical post |
| simple machine | Device accomplishing work with only one movement |
| wedge | Simple machine consisting of a moving inclined plane with one or two sloping sides |
| wheel and axle | Simple machine consisting of two different sized wheels that rotate together |
