Re: HUMOR: Re: challenge

From: Mike Lorrey (
Date: Tue Feb 05 2002 - 10:09:27 MST

Brian D Williams wrote:
> >From: Spike Jones <>
> >On a *theoretical frictionless* surface, neither somersaults nor
> >hands and knees will get you anywhere. Think in terms of
> >conservation of momentum. On a theoretical frictionless
> >surface, one cannot transfer momentum into the earth. So
> >you need to get it from elsewhere. spike
> I thought putting the surface on the earth was the loophole.
> In the absense of gravity of course the trick wouldn't work at all,
> but once it was on the earth I had the earth's mass and therefore
> gravity to work with, and of course the surface was no longer
> purely theoretical, it had to exist, so I could leave it at 90
> degrees...

Well, yes, if you launch yourself vertically high enough, you will rise
to an altitude such that your angular velocity is less (i.e. you are
rising to a slower orbit) and the earth spins faster so when you land
again you do so outside the frictionless surface.

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