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Simple Machines
Work & Simple Machines
19
Science
6th Grade
11/28/2011

Additional Science Flashcards

 


 

Cards

Term

 

work

Definition

force exerted on

an object that

causes it to move

Term

 

joule

Definition

unit of work;

equal to one newton-meter

 

Term

 

power

Definition

 

the rate at which work is done

Term

 

watt

Definition

 

derived unit of power

Term

 

output work

Definition

work done by a machine

as the output force acts

through the output distance;

output force X output distance

Term

 

input force

Definition

 

force exerted on a machine or 

force applied to a machine

Term

 

output force

Definition

 

force exerted on an object

by a machine

Term

 

wheel and axle

Definition

 

wheel attached to a pole; 

ex: screwdriver

Term

 

inclined plane

Definition

 

a flat sloped surface

ex:ramp

 

Term

 

wedge

Definition

 

an inclined plane that moves

thick at one end thin at the other

ex: front teeth

Term

 

compound machine

Definition

 

a device that combines two

or more simple machines

Term

 

screw

Definition

 

an inclined plane wrapped around a pole to form a spiral 

an inclined plane wrapped in a circle

Term

 

pulley

Definition
a rope wrapped around a grooved wheel
Term

 

fulcrum

Definition

 

a fixed point around

which a lever pivots(rotates)

 

Term

 

machine

Definition

 

changes the force, distance, 

or direction

a divice that makes work easier 

Term

 

lever

Definition

rigid bar that pivots around 

a fixed point, free to pivot; 

Ex: see saw

Term

 

work

Definition

 the forced exerted on an

object that causes it to move;

force X distance

Term

 

mechanical advantage

Definition

 

number of times a machine

increases a force exerted on it

Term

 

efficiency

Definition

percentage of

the input work

that is converted

to output work

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