A friend of mine came up with this idea that I would like to ask here. Just assume wormholes do exist and can be stable. Now put 2 wormholes over the surface of the earth. One 100meters above the ground and the other 1 kilometer straight above the first one. Link them so the first wormhole ends in the second. Now drop a object into the first wormhole. It will arrive at the second wormhole opening, fall straight down into the first and appear at the second wormhole again and so on. Constantly accelerating(neglect any air friction). Now rig up a device that takes advantage of the kinetic energi from the fall of the object. Wouldnt this be a unlimited energy supply? This must surely break energy conservation laws right? Since the object gets moved to a position with higher potential energy without spending any energy to get there.