Re: [Phys-l] definition of gravity

["LaMontagne, Bob" <RLAMONT@providence.edu>]

????? Cavendish never flew on the Space station.

He measured the force on two suspended objects due to the presence of two other nearby massive objects.  No rotation was involved. So the non-motional  fields on each mass were certainly measured (with low accuracy).

The inference as to the mass of the Earth was certainly problematic because the value of "g" that he used obviously included rotational effects.

Bob at PC

> -----Original Message-----
> From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
> bounces@carnot.physics.buffalo.edu] On Behalf Of John Mallinckrodt
> Sent: Tuesday, November 08, 2011 12:02 PM
> To: Forum for Physics Educators
> Subject: Re: [Phys-l] definition of gravity
>
> No, he didn't.  Tell me how Cavendish would determine the "part of the
> 'gravitational field' solely due to the presence of the Earth" using an
> instrument on the space station.
>
> On Nov 8, 2011, at 8:54 AM, LaMontagne, Bob wrote:
>
> > Really? Cavendish did that a while ago.
> >
> > Bob at PC
> >
> > > -----Original Message-----
> > > From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
> > > bounces@carnot.physics.buffalo.edu] On Behalf Of John Mallinckrodt
> > > Sent: Tuesday, November 08, 2011 10:54 AM
> > > To: Forum for Physics Educators
> > > Subject: Re: [Phys-l] definition of gravity
> > >
> > > I don't know what that "part" is because there is no way of measuring it.
> > >
> > > John Mallinckrodt
> > > Cal Poly Pomona
> > >
> > > On Nov 8, 2011, at 7:46 AM, LaMontagne, Bob wrote:
> > >
> > > > What name do you give to that part of the" gravitational field"
> > > > solely due to
> > > the presence of a nearby gravitating object (such as the Earth)?
> > > > Bob at PC
> > >
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