How to calculate attractive force between mag & electromag?

[radaballer]

I am aware of the complexity of magnetic fields, all i need is a ballpark functional equation of distance between an electromagnet and a permanent magnet. Can anyone point me in the right direction?

 

[Simon Bridge]

Have you tried googling for "how to calculate the force between magnets"?

i.e.
https://en.wikipedia.org/wiki/Force_between_magnets#Calculating_the_magnetic_force

You can also search these forums:
If you know how to find the force between two electromagnets or between two permanent magnets then you need only model one as the other.