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9Sci CH 7
Machines
| Question | Answer |
|---|---|
| bionics | designing replacement body parts |
| compound machine | combination of two or more simple machines |
| efficiency | ratio of useful work put out by a machine; always less than 100% |
| effort arm | part of a lever where effort force is applied |
| fulcrum | the fixed part where a lever pivots |
| ideal machine | machine that works 100% efficient; workout equals work in |
| inclined place | machine containing a slope surface |
| lever | machine of a bar with a pivot |
| machine | device that makes work easier |
| mechanical advantage | number of times a machine multiplies |
| power | measure of work done in a certain time |
| pulley | machine with a groove wheel and rope running along |
| resistance arm | a part of a lever where force is applied |
| resistance force | force exerted by a machine to overcome resistance to gravity or friction |
| screw | machine on an inclined plane wrapped around a post cylinder |
| simple machine | device that does work in one movement |
| wedge | machine with inclined plane and has one or two slopes |
| wheel and axle | machine with two different sized wheels that rotate |
Created by:
hockettd
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