lunes, 20 de septiembre de 2010

How inclined Planes Work

Inclines Planes:a straight,slantedsurface that is not moved when it is used

screw: an inclined plane wrapped around a central bar.

wedge:one or a combination of inclined planes that is moved when used

compound machine:a combination of two or more machines

efficiency:a ratio of the work done by a machine compared with the work put into the machine

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