>>13077487>So there is no way to do this by a system of magnets and move the object back by another magnet?Imagine you put 3 magnets in a tube where the middle one can move freely and other two are fixed.
If you put it as |SN SN SN| the middle one will be pulled by one or the other, which ever is closer, due to inverse square law.
If you put it as |SN NS SN| the middle one is being pushed by both so you've created an oscillator. Without any friction, it will oscillate indefinitely. But that's not a perpetual motion machine in a sense that you can extract infinite energy from it because if you try do that it's going to stop oscillating. There are plenty of things in nature that can be made to move forever (planetary orbits, electrons around a nucleus, a superfluid fountian...) but they are not sources of infinite energy because they will stop moving if you extract their energy.
>Since the magnet is constantly fighting against the gravity force keeping the object in the air, is it the semantic of system not being a machine because no parts are actually moving?Just because a force acts on a body it doesn't mean it's doing work. Your fat ass is exerting force on a bed yet isn't doing any work. A force can do work by displacing an object, otherwise it's doing no work. Work is defined as displacement times force W = Fd (joule = newton * meter). If displacement is zero, work done is zero. A spoon on a table is doing no work and is going to stay put on the table despite constantly exerting force on it.
>Or is it the fact that magnet will once wear out?It'll wear out, but it'll be due to other factors, not because it was levitating something. It's levitating it doing no work. In fact, if you push the object closer to the magnet you're going to store more energy in the field (that is going to be released by springing the object upward) than it had when the object was just levitating.
