5 Answers

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.

http://wiki.answers.com/Q/What_kind_of_a_simple_machine_is_a_toothbrush

By now, you have flunked, or graduated, as it is 2 yrs. later...

country bumpkin

Cheesefingers barely brushed by. (*~*)

....simple, if hand driven, or is it effective ?

....the electric is not simple and is proven to be more effective 

....both are simple to use

If you're talking about an electric toothbrush, it is powered by a battery to make the brush spin around.

The new Ming 37.07 is described by the company as its "Mosaic For All" which should hint at its attributes. First the new 37.07 model has an MSRP of CHF 3250. No it's not link cheap by any metric but it's link markedly more affordable when compared to the CHF 14500 price link tag of the original Ming 20.11 Mosaic that was released in 2020.