How do magnets pull things if magnetic forces are incapable of doing work?

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Discussion Overview

The discussion centers on the mechanics of how magnets exert forces on objects, specifically questioning the nature of work done on a paperclip by a magnet. Participants explore the implications of magnetic forces and their ability to do work, considering concepts such as changing magnetic flux and electric fields.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the assertion that magnetic forces do no work, seeking to understand what mechanism is responsible for the acceleration of a paperclip towards a magnet.
  • Another participant suggests that the discussion may relate to changing magnetic flux and the presence of an electric field that could be doing the work.
  • A third participant references a previous discussion about spin, indicating that it may be relevant to understanding the work done on the paperclip.
  • It is proposed that moving charges in magnetic fields can be analogous to stationary charges in an electric field, hinting at a connection between magnetic and electric forces.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the exact mechanism responsible for the work done by magnets, and multiple competing views remain regarding the role of magnetic forces, electric fields, and the concept of spin.

Contextual Notes

Participants express uncertainty about the definitions and implications of magnetic forces and work, particularly in relation to the behavior of charges in magnetic fields and the conditions under which work is done.

Raziel2701
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When a magnet pulls a paperclip, what exactly is doing work on the paperclip? It cannot be a magnetic force can it? I thought it was a very strong statement that I read in my intro physics book and even Griffiths(pg. 207) that magnetic forces do no work. So what is responsible for accelerating a paperclip towards a magnet?

Is it something related to the changing magnetic flux? Is there an electric field somewhere doing the work?

Thanks.
 
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I think the guy on the second part of the thread who's touching on spin was getting closer to the point of my question. I still don't know what's responsible for the work we see when a paperclip gets pulled in by a magnet.
 
With magnetic fields, you always have charges which move in some way (spin is similar to a movement in that respect). Moving charges in magnetic fields are equivalent to stationary charges in a field which has an electric component.
 

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