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What kind of a simple machine is a toothbrush?


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April 07, 2015 3:17PM

A toothbrush is not a simple machine, it does not work on the principle of levers, effort, and load.

It's not a machine at all in mathematical terms. A "machine" is that which performs "work", i.e. transfers or converts energy.

You arm moving the toothbrush is a machine by this definition, however.