Calculating Magnet Pull Force: What is the Equation?

  • Thread starter Thread starter teacher
  • Start date Start date
  • Tags Tags
    Magnet Strength
AI Thread Summary
Calculating the pull force of magnets involves specific parameters such as shape, thickness, diameter, and the Br value in gauss. The teacher seeks the underlying equation for these calculations to develop a lab experiment for students. The planned experiment includes measuring the force required to separate a magnet from metal and testing the effect of adding layers of plastic. A reference to a formula previously posted in the thread suggests there may be existing resources available. Assistance in locating the equation or relevant materials is requested for educational purposes.
teacher
Messages
1
Reaction score
0
I am a teacher and am in the process of developing labs dealing with magnets. I have seen calculators on the internet that can calculate the pull force in pounds for a magnet when provided the shape of magnet, thickness, diameter and Br value in gauss. I have failed to find the equation used for such calculations, can you point me in a direction where I may find such equations?

I would like to develop a lab where my students can use a Hooks Law apparatus and measure the force needed to separate a magnet from a plate of metal. And then place layers of plastic between the magnet and metal and measure the force again.

Any help would be great.
 
Physics news on Phys.org
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
View full post »

Thread 'Why measure the speed of light in one direction?'

It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
View full post »

Similar threads

B Calculating Force on an Iron Object with Magnetic Field
Replies
21
Views
4K
I Calculating Magnetic field strength of a magnet
4
Replies
198
Views
14K
A Identifying Magnet Grade for FEMM Simulation: Neodymium Cylinder Magnets
Replies
5
Views
1K
I Temperature vs Magnetic Strength (Flux) relationship in ferromagnets
Replies
9
Views
1K
I Calculation for proportional mechanical solenoid Force
Replies
3
Views
2K
I Quantifying the magnetic force on a magnet moving through a coil?
Replies
5
Views
2K
Finding Magnetic Moment from Pull Force
Replies
1
Views
1K
B Experiment issues (electromagnetism)
Replies
42
Views
2K
Is My Magnet's Behavior Influenced by the Metal Plate?
Replies
1
Views
1K
Measuring Magnetic Field Strength of a Cylindrical Magnet
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top