A way to calculate something about a ferromagnetic ball in a magnetic field? Answered
I've built something like this https://www.instructables.com/id/Mechanical-Rail-Accelerator---Non-electromagnet-%22r/ and now I am thinking of calculating the kinetic energy of a ball flying off the magnet if it was 'set off' by a ball at some velocity. I have a great lot of problems:
1 The ball is about the same size as the magnet, which makes it impossible to say it is 'infinitely small'.
2 It is near the pole, so the magnetic field is not even (not like inside a coil).
3 The ball is ferromagnetic, so the field is going to be even more disrupted.
4 There is no Physics teacher this week.
Maybe (I hope) there is a formula of potential energy of something like my ball in a magnetic field? Any ideas?