## machines list 2

##### Created by:

kerilynnash  on October 25, 2012

Jared 10/25/12

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# machines list 2

 rube goldberga deliberately over engineered machine that performs a very simple task in a very complex version, usually including a chain reaction.
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#### 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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