Here are some experiments on electromagnetic force interactions among spherical rare-earth magnets and spherical ferromagnetic balls.
A spherical rare-earth magnet is magnetically held on a table by a steel frame below. Rolling a spherical ferromagnetic ball towards the spherical rare-earth magnet on the table causes the spherical ferromagnetic ball to be stacked up 3-dimensionally on top of the spherical rare-earth magnet by kinetic-to-potential energy conversion.
Attaching together 1 spherical rare-earth magnet (with N and S poles) and 2 spherical ferromagnetic balls (no poles) forms a 2-dimensional threesome configuration of spheres on a table. The configuration has 2 strong bonds and 1 weak bond, analogous to either (1 male + 2 females) or (1 female + 2 males).
A spherical rare-earth magnet at one end is stuck to a spherical ferromagnetic ball. Another spherical ferromagnetic ball is attached or detached from the spherical ferromagnetic ball. The magnetic attraction force between the 2 spherical ferromagnetic balls does not obey the inverse-square law but exhibits an ON/OFF behaviour.
