How are the poles of a tapered magnet distributed?

[vdance]

Homework Statement

Personal interests.

Relevant Equations

I didn't find the right formula.

How are the poles of a tapered magnet distributed?
Is there any way to calculate its magnetic force?

 

[renormalize]

Is there any way to calculate its magnetic force?

Looks like FEM modeling software is your best bet for finding magnetic force. Below is an example FEM model of a conical magnet that I found online. Note that the magnetic field lines don't concentrate at the apex nearly as strongly as in your hand sketch.

http://dx.doi.org/10.1371/journal.pone.0188015

 

[vdance]

That's a very clear explanation, thank you!