Comment Re:Perpetual Motion (Score 2, Informative) 569
In short, No.
The magnetic force is much like using a rubber band in reverse. Lets say you had a gun with a permanent magnet. It would take a significant amount of force to load the projectile into the gun (forcing two similar poles near each other). This stores potential energy. When you then fire the weapon, the potential energy that you gave it while loading the projectile then becomes kinetic energy. (ie, the projectile is ejected).
Alternatively, using an artificial magnet, you can load the projective with little or no effort and then input a large amount of electrical current which then creates a magnetic field, launching the projectile. In any case, you don't get something for nothing. You always get back less than you put in.
The magnetic force is much like using a rubber band in reverse. Lets say you had a gun with a permanent magnet. It would take a significant amount of force to load the projectile into the gun (forcing two similar poles near each other). This stores potential energy. When you then fire the weapon, the potential energy that you gave it while loading the projectile then becomes kinetic energy. (ie, the projectile is ejected).
Alternatively, using an artificial magnet, you can load the projective with little or no effort and then input a large amount of electrical current which then creates a magnetic field, launching the projectile. In any case, you don't get something for nothing. You always get back less than you put in.
