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Re: [Phys-L] force-pair question

From: Ian Sefton <I.Sefton@physics.usyd.edu.au>
Date: Wed, 7 Jan 2015 08:16:45 +1100

On 06/01/2015, at 4:40 PM, John Denker wrote:

Hi Folks --

A while back I came across the following question:
"Why do forces always occur in pairs?"

My answer is that they don't.

Consider the Lorentz force on a moving particle. Where is the other half of that pair?

As has often been pointed out in this forum: momentum conservation is a better idea.

Cheers,
Ian

I.Sefton@physics.usyd.edu.au

Follow-Ups:
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References:
- [Phys-L] Late Physics Learner
  - From: Bill Norwood <bnorwood111@gmail.com>
- Re: [Phys-L] Late Physics Learner
  - From: Richard Heckathorn <geepaw@wowway.com>
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  - From: Bernard Cleyet <bernard@cleyet.org>
- Re: [Phys-L] Late Physics Learner
  - From: Richard Heckathorn <geepaw@wowway.com>
- Re: [Phys-L] Late Physics Learner
  - From: Todd Pedlar <pedlto01@luther.edu>
- Re: [Phys-L] Late Physics Learner -
  - From: "Richard Heckathorn" <geepaw@wowway.com>
- Re: [Phys-L] Late Physics Learner -
  - From: Todd Pedlar <pedlto01@luther.edu>
- Re: [Phys-L] Late Physics Learner -
  - From: Marty Weiss <martweiss@comcast.net>
- Re: [Phys-L] Late Physics Learner -
  - From: Richard Heckathorn <geepaw@wowway.com>
- [Phys-L] force-pair question
  - From: John Denker <jsd@av8n.com>

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