I get that the main reason perpetual motion isn’t possible is because energy loss due to friction, but that’s not the case with magnets (I think?). Why can’t perpetual motion be achieved with magnets? What can’t we make something that spins and creates energy using magnets to propel a turbine?
In: Physics
A magnet pulls in one direction. How are you going to get it to produce a spinning motion? Sure, you can *start* something spinning by pulling with a magnet, but once the thing you’re pulling on has spun past the magnet’s position, the magnetic pull is now slowing it down. The only way you can maintain the spin is either to switch the magnet on and off (which means a powered magnet, which means you have to supply power) or else move the magnet as well (which requires power).
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