I realise just from the title a lot of people are going to shoot me down very quickly, but these are just questions to help my basic understanding. I'm definitely not a physics buff. I just want to know a couple of things pertaining to gravity and permanent magnets. Technically speaking are these 2 forces not endless in their possibly energy? Presuming a permanent magnet truly is as it says on the label; permanent; then why can't they be used as an endless energy supply in some form or another? The same question for gravity? I realise that perpetual motion in theory is impossible as energy must be lost somewhere and so it would eventually have to stop. But if there are endless amounts of energy, why can't they be constantly re-used? I'm looking for a better understanding of the mechanics of all this. It just doesn't make sense to me as to why these forces cannot be harnessed in a way that makes them viable for some form of a perpetual motion device. If it could be explained without someone saying something like, 'Newtons 1st law states....' that would be great. I'm looking for an explanation as to why these forces in one way or another can't be used as endless supply of energy or as a form of perpetual motion. I'm not trying to claim they can be either, I just want to know why not. Like I said just trying to increase my understanding of the matter so any help and advice that could improve my understanding would be greatly appreciated.