Edheads - Simple Machines Activities - Lever - Pulley - Wedge - Screw - Inclined Plane ... - 0 views
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Peter Olm on 27 Jan 10Interactive site on simple and compound machines (It lists "gears" as a simple machine, which is the only place where I have seen this, as everywhere else just has the traditional 6 simple machines. Likewise, some of the examples of various machines are a bit tenuous, but it is a fun site, nonetheless)