Magnetic/kinetic energy production.
So lets say you have a magnetic ring, that is held in a vacuum that is sealed so it's safe from outside forces. And there are other magnets inside the object that makes the ring spin. You have it to where the only friction comes from the ring hitting something, to produce energy through the movement of it makes heat, or it uses the kinetic energy for powering something, would that work, or would this just be a whole waste of time?
I'm still in high school, and I haven't done physics so there may be forces I'm overlooking that will be obvious to someone who has studied it.