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chapter 8

TermDefinition
Actuator Device used to convert fluid power into either linear or rotary motion .
air compressor Device used by pneumatic system to produce compressed gas .
Bearing Metal piece that is used to reduce friction with shafts by using smooth metal balls inside circular pieces of metal balls inside circular pieces of metal that fit around the shaft.
belt Band of material that is used to link and transmit energy between pulleys .
cylinder Device that uses the pressure of fluid to move a piston that is connected to a rod .
energy Ability to do work .
fluid motor Device similar to a fluid pump, only used in reverse. Fluid is pumped through gears to turn the gears and gear shafts .
fluid pump Pump used by hydraulic system to compress fluid .
force Push or pull of an object resulting from contact with another with another object .
friction Force that acts against motion when two surfaces rub together .
gear Device that transmits rotational force against another gear or device .
gear ratio Ratio of speed (angular velocity) of input shaft to that of output shaft .
horsepower Unit of work defined as 33,000 foot-pounds/ min .
hydraulic system System that uses a liquid such as water or oil, to transmit power .
inclined plane Simple machine that uses a flat surface that is higher on one end .
Kinetic energy Energy in motion .
Lever Simple machine that uses a stiff bar rested on a fulcrum, or pivot, to lift or move a load .
Linear motion Movement in a straigth line .
Mechanical advantage Number of times a machine or tool multiplies the input force to move a load .
Mechanical energy Energy in motion that uses mechanical device for conversion .
Mechanical engeeniring Designing,building, and maintaining of mechanical,thermal, and fluid system .
Pascal's law Law that states that all fluids exert the same amount of pressure in all directions when in a limited space .
Pneumatic system System that uses air to transmit power .
Potential energy Energy that is stored and waiting to be used .
Power Rate at which work is done or energy is transmitted; the amount of work done based on a period of time .
Power system System that takes energy and convert it into power to accomplish work .
pulley Simple machine that consist of a wheel and rope used to move objects .
Reciprocating motion Linear back-and-forth motion .
rotary actuator Device that can provide a small amount of rotation .
rotary motion Motion that can move in a circle .
Screw Simple machine that is inclined plane wrapped around a cylinder .
Shaft Cylindrical piece used to transfer rotary motion .
Simple machine Tool that makes work easier ; includes the lever, inclined plane, wheel and axle, screw, wedge, and pulley .
Torque Measure of how much force acting on an object causes that object to rotate .
Valve Device used to control either the rate or directions of the fluid flow .
Wedge Simple machine that is a combination of two inclined planes .
Wheel and axle Simple machine that uses a circular wheel with an axle in the middle to create a mechanical advantage .
Work Application of force to move an object a distance .
Created by: 311558
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