I want to know if there is a formula for how much force it takes to seperate a magnet. I am mostly interested in sliding 2 rare earth metal magnets apart instead of pulling them. I assume it is a function of the area and strength. Any help is appreciated!
2006-11-07 17:48:04 · 2 answers · asked by Local Hero 1 in Science & Mathematics ➔ Engineering
In this reference, http://en.wikipedia.org/wiki/Magnets near the end of the article there is a formula for the force between bar magnets very close together. You wll need to know the magnetic field strength of the magnet. Also, for sliding, you will need to know the coefficient of friction.
2006-11-07 19:42:59 · answer #1 · answered by gp4rts 7 · 0⤊ 0⤋
the two magnets will slide when the force applied to shearing them is greater than the static friction force between them. the static frictional force is equal to the attraction force times the static friction coefficient. the attraction force can be measured or calculated, but the frictional coefficient depends on many factors, the biggest being the surface finishs of the contact areas. the best way to figure it out is by measuring. once data for the friction coefficient can be determined, then you have a formula that would represent the model.
this force is only required to start the magnets moving. Once they start moving, the magnetic force decreases, and the fricional force decreases due to a lower dynamic coefficient of friction
2006-11-08 03:15:36 · answer #2 · answered by igot4onit 2 · 0⤊ 0⤋