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Screw

Page history last edited by PBworks 14 years, 2 months ago

 

A screw is a simple machine that is made from another simple machine.  It is actually an inclined plane that winds around a pole.  A screw has ridges and is not smooth like a nail.  Some screws are used to lower and raise things.  They are also used to hold objects together.

 

Examples of Screws

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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