[Phys-L] Re: Newton's Equation - 2 or 3 terms?

[Bernard Cleyet <anngeorg@PACBELL.NET>]

You mean the cart's mass is leaking out the bottom, or the conveyer
problem (mass added to the belt)?  Better are rocket problems especially
as the fuel runs out varying the F as well as the M.

bc, still no deluge?

P.s. wasn't it originally stated as F = p ^.   ?  So (accidentally) GR
compatible?

Ludwik Kowalski wrote:

> On Monday, Sep 5, 2005, at 09:36 America/New_York, Brian Whatcott wrote:
>
>
> > At 06:40 AM 9/5/2005, Gene Mosca, you wrote:
> >
> >
> > > On September 4, 2005 3:44:21 PM EDT, John Clement wrote:
> > >
> > >
> > > > 3 variable equations such as F=ma
> > >
> > > F=ma is a two variable equation.  Mass is not a variable in this
> > > equation
> > >
> > > Gene
> >
> >
> > In the variant f = mg we suppose that the force acting is
> >  proportional to the mass, in order to justify the constant
> > acceleration due to gravity.
>
>
> Mass is also a variable in a setup with which the effect of the mass on
> acceleration (keeping F constant) is demonstrated.
> What I have in mind is a loaded cart (variable m1) accelerated along
> the horizontal surface by a net force F=(m2-m1)*g, where m2 is a mass
> suspended over a pulley. It is a good and effective demo.
>
> Ludwik Kowalski
> Let the perfect not be the enemy of the good.
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