machines list 2
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Created by:
kerilynnash on October 25, 2012
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Jared 10/25/12
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14 terms
Terms | Definitions |
|---|---|
 rube goldberg | a deliberately over engineered machine that performs a very simple task in a very complex version, usually including a chain reaction. |
| simple machine | include any of the basic mechanical devices for applying a force. The six types are the lever, pulley, wheel and axle, inclined plane, wedge and screw |
| Force | a push or a pull. Described by its strength and by the direction in which it acts. (Is = to massxacceleration |
| work | a force exerted on an object causing it to move in the same direction in which the force was exerted (is = to force x distance) |
| Newton | a unit of measurement that equals the force required to accelerate 1 kilogram of a mass at 1 meter per second |
| Joule | a unit of work equal to one newton meter |
| pwer | the amount of work done on an object in a unit of time (is = to work/time or forcexdistance/time |
| Machine | make work easier by changing at least one of three factors. May change the amount of force you exert, the distance over which you exert your force, or the direction in which you exert force. |
| input force | the force you exert to the machine |
| output force | the force the machine exerts on an object |
| in put work | input force x input distance |
| output work | output force x output distance |
| Mechanical advantange (M.A.) | the number of times a machine increases a force exerted on it |
| efficiency | the percentage of the input work that is converted to output work. the higher the percentage the more efficient the machine. |
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