Simple Machines
Ed Heads Interactive Site Simple Machines Glossary
Simple Machines from  mikids Inventor's Toolbox
Simple Machines Quiz Simple Machines ThinkQuest
  Simple Machines Made Simple  

simple machine-makes work easier, made of few parts,
changes the speed, direction or strength of the force

simple machine how it makes work easier example
wheel & axel a  wheel with a rod,
 called and axel, through its center: both parts move together to lift or move loads
wheelbarrow, door knob, car, wagon, pencil sharpener
inclined plane a slanting surface connecting a lower level to a higher level allows objects move up or down it ramp, slide, stairs, escalator
wedge an object with at least one slanting side ending in a sharp edge cuts or spreads an object apart ax, chisel, knife, nail, pin
pulley a grooved wheel with a rope or cable around it moves things up, down, or across clothesline, crane, mini-blind, crane
lever

 

a stiff bar that rests on a support called a fulcrum lifts or moves loads seesaw, crow bar, shovel, bottle opener

 

screw An inclined plane wrapped around a pole holds things together or lifts screw, bolt, jar lid, vise, drill, corkscrew

 

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~page updated 4/1/08 com~

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