Hey guy, Ive been recently investigating the phenomena of eddy currents, particularly that of a magnet falling down a copper tube. To the people who havent seen it before, basically the magnet reaches terminal velocity in the copper tube extremely quickly, and takes a long time to leave the copper tube. Anyway, i was wondering how could you show that the time taken for the magnet to reach terminal velocity is negligible. Thanks so much guys :) p.s. i have already calculated the formula for estimating the final velocity of the copper magnet, but im stumped on figuring out how to prove that it would reach the terminal velocity in a very small period of time.