Engineering Systems Misoc
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Created by:
pmbyellow2010 on December 9, 2010
Subjects:
engineering, mechanical engineering, electrical engineering
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30 terms
Terms | Definitions |
|---|---|
 lever | A rigid object which is used in contact with a pivot (fulcrum) to multiply the effort (force) applied to another object |
| physical principle of a lever | conserve momentum |
| class 1 lever | Fulcrum between load and applied force |
| class 2 lever | Load between applied force and fulcrum |
| class 3 lever | Applied force between load and fulcrum |
| wheel and axle | modified lever of the first class that rotates in a circle around a center point or fulcrum |
| inclined plane | a flat surface with one end higher than the other |
| wedge | specialized incline plane |
| pulley and belt | changes direction of applied force |
| 6 simple machines | pulley and belt, lever, screw, incline plane, wheel and axle, screw |
| class 1 pulley | fixed |
| class 2 pulley | movable |
| class 3 pulley | compound |
| gear | rotating machine part having cut teeth / cogs, which mesh with another toothed part in order to transmit torque |
| transmittion | two or more gears working in tandem to generate a mechanical advantage (= simple machine) |
| gear ratio | the ratio / relationship between the numbers of teeth of two gears that are meshed |
| screw | an inclined plane wrapped helically around an axis for a number of turns |
| bearing | device that allows constrained relative motion between two or more parts (rotation) |
| mechanisms | Crank & Slider Mechanism, Ratchet Mechanism, Quick-return Crank Mechanism, Cams:(Eccentric cam, Snail-and-drop cam, Swash-plate cam),Geneva Wheel, Universal Joint |
| lubricant | a substance inserted between two moving surfaces to reduce friction, improve efficiency, & reduce wear |
| careers in electronics | Technician, Technologist, Engineer |
| matter | That which has weight and occupies space |
| valence shell | outer most shell of an atom |
| ions | lost or gained an electron |
| popular source of energy | batteries |
| current flow | Relationship to Resistance and current flow |
| conductance | Ability to allow current to flow |
| resistor |  |
| resistor tolerance | The range of acceptable values |
| Voltage | Current times Resistance |
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