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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.