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Tuesday, December 4, 2012

Pulley

The Pulley
More science lessons on Simple Machines neoK12.com
A pulley is when you pull something down and the other  one goes up.
A pulley is a wheel on an  axle
And is a simple machine but is not one of the two simple machines
A pulley is also called a sheave or a drum.
The drive element of the pulley is rope,chain,cable or a belt.
A pulley is a force when you pull something the force pushes the next one up.
BY TORI AND MCKENZIE



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