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PostHeaderIcon Pulleys - Yesterday and Today

Science - Simple Machines

Our Gizmo on pulleys yesterday taught us that the more pulleys you use to do a job, the more your force is multiplied. Here is a picture of a pulley from recent times and one from the turn of the last century (1900). You can tell that the styles have not changed much. A simple machine is still a simple machine.

Last Updated (Tuesday, 03 May 2011 20:01)