I thought about machines when our pin oak was being felled over the last couple of weeks. What a different job it would have been without chainsaws and a pneumatic wood splitter!How many simple machine elements can you see being used? Remember they are: wedge, inclined plane, wheel and axle, screw, lever and pulley. I was reminding myself about the pulley using google and I came across this very cool website showing how when you combine two or more simple machines they are called compound machine. It also lists the gear (cog) as a simple machine.
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