Hey guys, New here. It's been a while since I've done any physics. I've been playing around with some mental work in my head and I am trying to figure out why something doesn't work. I know it shouldn't work, but I can't figure out the why. What I am talking about is utilizing similar charges to create movement. I know that a negative charge would push away from a negative charge, just like a positive charge would push away from a positive charge, and go together if they are opposite. Much like how magnets work. The issue I get into is if I picture doing this in a circle. Say I had 10 items (lets say balls) arranged so that they were in a circle. They can rotate around an axis. I'll throw out random numbers just for getting a general picture, but are not quantitatively the same as it would be in a real situation (that's because I have no clue as to what charges would be required off-hand). If I had all ten balls with a charge of -200, I would assume nothing would happen. Now if ball1 were charged with -1. and ball2 were charged with -20, with increasing charges up to ball10 charged with -200, my mind is telling me that -1 would rather go towards -20 because it is the path of least resistance. And the same with -200 would rather go to -1 than say -180. One part of me says that it would rotate, another part of me says that it wouldn't, because it's supposed to be impossible to have something power itself from itself. I assume there is some principle similar to a fan not being able to blow the sail on a sail boat, but I can't think of it. Anyways, can you guys help me out with the logic here? Thanks.