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Re: [Phys-l] Weightlessness in 4 easy steps



On 11/22/2006 01:58 PM, Rauber, Joel wrote:

|
| 1) The hard part of the recent discussion revolves around the
| definition of g. There are disagreements about that.
|
| By the way, there seems to be agreement that
| force of gravity = m g [1a]

Not quite so fast:

Let's say I agree to this, (I'm inclined to do so)

What then should I call GMm/r^2, the force of . . .?

I call it the force of N-gravity.

I think I either have to distinguish two gravity forces; the E type and
the N type much as you distinguish two g's

Exactly so.

I should have said:

force of N-gravity = m g_N
force of E-gravity = m g_E