Re: [Phys-l] momentum and energy

[Bernard Cleyet <bernardcleyet@redshift.com>]

Hiding m in p doesn't make it disappear.    In a finite universe E can 
never be zero.   It may not be measurable, because of noise and other 
limitations, but never zero.

bc, suspicious of zeros and infinities in a finite U.

p.s.

"The fix is simple:  Use M and V to denote the mass and velocity of the earth,
then treat everything just like any other two-body collision problem.  You
will find that M is large and V is small, such that MV is not trivial.
you will find that V makes a negligible contribution to the golf ball
velocity, but a nontrivial contribution to the conservation law."


I think jsd should have stopped here.



John Denker wrote:

> Al Bachman wrote:
>
>  
>
> > > The kinetic energy of an object (treated as a particle) can be written as (p^2)/(2M),
> > >
> > > E goes to 0 as  M approaches infinity.
> > >      
>
>
> On 11/13/2006 11:15 AM, Bernard Cleyet wrote:
>  
>
> > Al is, of course, testing you(all) or determining wool detection.  
> >
> > bc, not fooled
> >    
>
> jsd, liking Al's answer better than the one I posted myself.
>
> jsd, having no idea what BC is trying to say.
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