I wasn't sure where to post my question but it seems like it would belong here. I was hoping for an anti-physics category or something hehe. I apologize in advance if I was wrong. Anyway, I've been reading about perpetual motion machines and I understand the physics behind them and why they are impossible. I found a lot of examples of machines and enjoy figuring out why they won't work. There is just one example I found that I'm still not entirely sure why it won't work. Here's a link to an image describing it. http://www.kilty.com/graphics/magnet.gif Wikipedia gave it as an example but didn't give an explanation for why it wouldn't work. The other sites I found gave confusing explanations as well. Anyone have any experience with this example and can tell me why it wouldn't work? Thanks.