Re: [Algorithms] rather curious

[Frag_ D. <fra...@ho...>]

     Yeah, I had a great day yesterday, and didn't work at all.  A little 
splat-ball, 14 hours of sleep, talking to friends, wasting time, etc.  Then 
again, I never ACTUALLY work.

     We really have some big physics people on this list.  Well, keep going, 
this is very interesting.


>From: ro...@do... (Ron Levine)
>Reply-To: gda...@li...
>To: gda...@li...
>Subject: Re: [Algorithms] rather curious
>Date: Mon, 11 Sep 2000 15:08:17 GMT
>
>Jeff Lander  wrote:
>
> >Man, we are all working late tonight.  On a sunday, that's kinda sad.
>
>Nah,  I spent a pleasurable day listening to a free concert by the San
>Francisco Opera in Golden Gate Park, and am so wiped out by sunburn
>that sitting in front of the tube and pontificating on physics is an
>entirely appropriate activity.
>
> >But to drag this back to algorithms, your use of Newton's gravitation law 
>is getting you into trouble.
> >
>
> >Realize that the only thing that effects when two dropped objects hit the 
>ground
> > is the acceleration of those objects.  Force doesn't enter into it yet.
>
>Actually, in most developments of the logical foundations of physics
>that I've seen I think that  "force" isnot well defined.  In the way I
>was using it, in terms of the "four forces",  it refers to a type of
>"interaction".
>
> >....
> >So you can see that a body of any mass will hit the earth at the same 
>time.
> >The difference due to the original gravitation law is that a more massive 
>body
> > will hit the earth with more FORCE and make a bigger dent.
> >
>
>Here, I think your use of "FORCE" is not appropriate.  The two bodies
>fall under the same acceleration, so fall for the same time duration
>and hit the earth with the same speed, but the more massive body has
>more kinetic energy and more momentum, so makes a bigger dent.
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