I've been digging around on the internet for information about magnets. I've found some interesting thing like the inverse square law of intensity, but I've noticed the Lorentz equations tend to deal mostly with charged particles. I'm really looking for information about the net field's effect on massive objects, the forces exerted during repulsion of said objects, and any "spring" constant that might apply for entry and exit of these fields. Does anyone know a good resource for this? One such example is magnet A enters the repelling field of magnet B, and then the normal force holding it there is suddenly released. How far will A travel given a mass of M if both fields exert a net force of F at surface distance of D. A bit simplistic and not terribly useful, I know, but if anyone can shed some light on this I would be most appreciative.