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Designing Effective Projects: Go-Go Gadget
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Gadget Research
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Simple Machine
LEVER INCLINED PLANE WHEEL AND AXLE
A lever is an arm that turns against a point (fulcrum). There are three classes of levers. You can tell what kind, depending on the position of the fulcrum. A straight, slanted surface allows a load to be moved over a longer distance, so less force is required. A wheel is fixed to a shaft or axle and they move together. Sometimes the wheel has a crank or handle.
Example Picture or Diagram


seesaw


seesaw

boatramp


boat ramp

sharpener



pencil sharpener

Citation

Edheads: Activate your Mind
http://edheads.org/activities/
simple-machines/index.htm*		 Work is Simple with Simple
Machines
www.ed.uri.edu/SMART96/
ELEMSC/SMARTmachines/
machine.html*		 The Franklin Institute Online Simple Machines sln.fi.edu/qa97/spotlight3/
spotlight3.html*
Simple Machine
WEDGE SCREW PULLEY
Turn an inclined plane down and use it to push things apart. A wedge is basically two inclined planes set back-to-back. A screw does work by moving a load across a spiraling inclined plane. The screw on a piano stool lets the seat go up or down. Often a lever like a screwdriver works to give force to the screw. In a pulley, a cord moves up or down easily over a wheel. If you attach something to the cord, it can be moved up or down. With a pulley you trade force for distance, making work easier.
Example Picture or Diagram


axe

axe


Archimedes' water screw
flagpole
flagpole
Citation
The Franklin Institute Online Simple Machines
sln.fi.edu/qa97/spotlight3/
spotlight3.html*		 Edheads: Activate your Mind
http://edheads.org/activities/simple-machines/index.htm*		 Franklin Institute Online Simple Machines
sln.fi.edu/qa97/spotlight3/
spotlight3.html*
 

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