Both the permanent and electromagnet will be constrained within a cylindrical tube (both magnets will be of cylindrical shaped, and have more/less the same cross sectional area). I want to know if its possible to calculate the repulsion force, in lbs, between the magnets, with a distance increment of 0.25cm. Ideally, I wish to have the strength of the permanent magnet match closely to that of the electromagnet, or vise-versa. Will having matching strength magnets be the ideal set up to yield the greatest repulsion? Thanks ahead of times!