Forces Involved in an Electrical Motor According to Newton's Law

AI Thread Summary
The discussion focuses on calculating forces in an electrical motor based on Newton's laws, specifically addressing two scenarios presented in drawings. In Scenario 1, the user seeks confirmation on the accuracy of the force interpretations, while Scenario 2 raises concerns about the balance of forces, noting a discrepancy where a 10N force acts against a 5N force. It is emphasized that according to Newton's third law, equal and opposite forces must be present, leading to confusion about the forces acting on the motor's components. The user questions the labeling of magnets as "10N" and "5N," seeking clarification on the forces involved when the electromagnet is activated. The conversation highlights the importance of understanding force interactions in motor design to ensure compliance with Newtonian principles.
nelson_qna
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Hi Everyone.

I've been trying to build an electrical motor and would like know the method to actually calculate the forces exerted on several parts in the motor according to Newton's laws. I've attached some pictures and drawings of the motor I'm trying to build. There are two scenarios that I've considered. Scenario 1 (Please see drawings Scenario 1) & Scenario 2 (Please see drawing Scenario 2)

Question 1 - "According to Drawing in Scenario 1"

Is my interpretation of all the forces involved in the motor correct according to Newton's Law? (Dismissing Friction Of Course)


Question 2 - "According to Drawing in Scenario 2"

In scenario 2 is all the forces involved in the drawing of scenario 2 correct and does it violets Newton's laws?

It feels wrong as 10N is acting on the 4 bolts in the + direction and 5N is acting on the pin (Q) in the - Direction. This 2 forces should be equal according to Newton's laws. If not there will be a nett force of -5N acting on the table. I just can't see how 10N of force is transferred from the permanent magnets to point Q where the bearing pivots.

Please Explain Thank You.
 

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Why are the magnets labeled "10N magnet" and "5N magnet". What property of the magnets is 10 and 5 Newtons?
 
The 10N & 5N are the forces acting against the magnet when the electromagnet is turned on.
 
nelson_qna said:
The 10N & 5N are the forces acting against the magnet when the electromagnet is turned on.
Maybe I'm misunderstanding your diagram but it looks like in scenario 2 you have a 10N force acting against a 5N force. According to Newton's 3rd law, this is not something that could happen in nature. Both magnets have to be experiencing the same force.
 
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...
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