Re: Forces w/o third-law partners???????

[Bob Sciamanda <trebor@VELOCITY.NET>]

This is why centrifugal and other inertial forces are called
"fictitious" in traditional Newtonian mechanics.

Bob

Bob Sciamanda
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor
----- Original Message -----
From: John S. Denker <jsd@MONMOUTH.COM>
To: <PHYS-L@lists.nau.edu>
Sent: Wednesday, October 20, 1999 11:25 PM
Subject: Re: Forces w/o third-law partners???????


> At 07:40 PM 10/20/99 -0700, Leigh Palmer wrote in part:
> > the force that acts on a body in an
> > Earth based lab, that I have been calling "weight", doesn't have a
> > third law partner. The gravitational force the body exerts on the
> > Earth isn't quite the same magnitude and it doesn't act in exactly in
> > the opposite direction.
>
> That appears to be tantamount to a statement that momentum is not
conserved.
> Are we really going to claim that gravitation doesn't conserve
momentum?
> Yikes!
>
> Forces without third-law partners?  Somebody please tell me this
doesn't
> say what it seems to say.