I was thinking about gravimagnetism, in particular the curious comparisons to electromagnetic results. In my physics studies on electromagnetism, I remember one exercise asking to describe the setup for generators and motors, i.e. conducting coil and magnet. One of the results to be obtained was : which way does the coil force the magnet as it enters the coil? The movement of the magnet through the coil is opposed by the induced magnetism of the coil. OK, but then the exercise asked to prove that if it were the other way, coil attracted the magnet through the coil, then it would be a violation of the 1st law of themodyanics. i.e. a magnet on a closed track passing through the coil would build up KE indefinately. OK, but this proof would also infer the equivalent gravimagnetism setup would break the FLoT. Since this isn't allowed, some other physics must happen to stop the violation. What is it I wonder? http://en.wikipedia.org/wiki/Gravimagnetism" [Broken] mentions that "if two wheels are spun on a common axis, the mutual gravitational attraction between the two wheels arguably ought to be greater if they spin in opposite directions than in the same direction." Wiki doesn't say that due to that result of physics ( I can't remember what it's called, someone tell me, I'll call it the minimal potential law ) entities will naturally 'fall' towards their lowest potential energy states, therefore as the velocity of rotation of the wheels increases, the attraction between the wheels will become stronger and amplify the gravimagnetic effect, a postive feedback loop. In protest someone might point out that the lowest energy state of the wheels is zero velocity, so the minimal potential law would suggest the wheels would come to stop ( by friction ) not speed up. However theorectic science has for a long while had gravity as a negative force, gravity force has a minus sign in equations, and the convention isn't just arbitary. If the wheels spun fast enough, gravimagetism would present a lower energy state than zero velocity, and the wheels would 'fall' towards this feedback loop. In practice, the most likely candidates for gravimagnetism are spinning quasars and neutron stars. Anyway, what are the 'official' theorectics on how the electric motor gravity equivalent set up doesn't break the FLoT? I was thinking since relativity seems to slow things down in there internal workings, maybe this is where the energy is balanced out?