Hi, I got hold of a set of kitchen weighing scales which are made of some ferromagnetic plate and my neodymium magnets. So the reading on the weighing scales increases as you bring the magnet near the weighing plate, as expected... they then reach a maximum just before you touch the magnets to the plate. The moment you let the magnets hit the scales, the reading goes down to simply the weight of the magnets (in my case, nearly a fifth of the maximum reading). I had always found magnets quite intriguing from a structural mechanics point of view (is magnetic force between 2 magnets/a magnet and a ferromagnetic material an internal force or an external force). It appears that the attraction is treated as an external force until they touch. This all may be very obvious, but comments please!