Comment on see the joke is that someone else does the work
davidagain@lemmy.world 1 week agoBut that’s true of gravitational forces too, otherwise satellites wouldn’t have constant speed. It’s silly and misleading to say that magnetic forces do no work. If I turn an electromagnet on next to a spoon, the spoon will move and the magnetic force did some work.
mexicancartel@lemmy.dbzer0.com 1 week ago
Gravity does no work on satellites or objects that go in circular orbits. The force is there but it does no work and hence no energy change/transfer. Work is defined based on energy change by work-energy theorem
davidagain@lemmy.world 1 week ago
My point is that whether a force does work doesn’t depend on what the force is. It makes no more sense to say that magnetic forces do no work than it does to say that gravitational forces do no work.
mexicancartel@lemmy.dbzer0.com 1 week ago
But magnetic force does no work to a charged particle in any way. While gravitational force CAN do work and it does work on most cases(every non circular orbits or just a mass falling down). That’s why magnetic force case is emphasised
davidagain@lemmy.world 1 week ago
I suspect I’m using a naive macro model and inaccurate terminology whereas you’re using a micro model and accurate terminology.
Is there even such a thing as magnetic force? Reading up a bit, it only talks about magnetic fields.