Force between a bar magnet and iron

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Discussion Overview

The discussion revolves around the force exerted between a bar magnet and an iron block when the magnet's field saturates the iron. Participants explore the theoretical quantification of this force in the context of magnetism, particularly focusing on the interaction across a wooden interface.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant describes a scenario involving a bar magnet with a magnetic field B and an iron block, seeking to understand the force exerted by the iron block on the wooden interface when magnetically saturated.
  • Another participant suggests that the force exerted by the iron block on the wooden interface is equal to the force that the magnet and the iron exert on each other, implying a balance of forces.
  • A participant expresses a desire to quantify the force in question, indicating a need for more precise understanding or calculations.
  • Links to previous discussions on related topics are provided, suggesting that there may be additional insights or established discussions that could aid in understanding the problem.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the quantification of the force; instead, there are multiple viewpoints regarding the nature of the forces involved and how to approach the problem theoretically.

Contextual Notes

The discussion lacks specific mathematical formulations or detailed assumptions regarding the properties of the materials involved, such as the magnetic permeability of the iron or the characteristics of the magnetic field.

anorred
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I'm an inventor and I have an idea involving magnets. Unfortunately, I'm having a hard time trying to interpret magnetic equations. Please forgive me if I sound like a noob.. I'm new to magnetism.

Lets say you have a bar magnet with a field B, oriented perpendicular to a wooden interface with a thickness "d." The north end of the magnet touches the wood. Directly on the other side of the interface is an iron block with a mass, m. For simplicity, let's say this iron block is a dimensionless point in the magnetic field. If the field B magnetically saturates the iron block, what force does the iron block exert on the wooden interface.

I'm asking this question to gain a better understanding of magnetism and how to theoretically quantify magnetic concepts. Please educate me! Thanks!
 
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anorred said:
If the field B magnetically saturates the iron block, what force does the iron block exert on the wooden interface.
The wooden surface exerts enough force on the iron and the magnet to keep them apart ... this would be equal to the force the magnet and the iron have on each other.

Also see:
https://www.physicsforums.com/showthread.php?t=354314
 
I know. I'm trying to quantify this force though.
 

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