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Cheman Feb18-05 07:49 PM

Contact forces and action-at-a-distance forces......
Are all contact forces the result of action-at-a-distance forces? After all, surely it all boils down to electrostatic repulsions, etc?

Thanks in advance.

ramollari Feb19-05 06:56 AM

Yes, you are right. There's no actual meaning of 'contact' when we talk about forces. All of them can be seen as interactions in distance, that can be elecromagnetic, gravitational, weak, and strong.
However there are now some modern theories that explain forces at distance as exchange of particles.

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