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From: pamp@bcsaic.UUCP (pam pincha)
Newsgroups: net.movies,net.books,net.sf-lovers
Subject: Re: Why shouldn't time travel leave you in the same spot?
Message-ID: <227@bcsaic.UUCP>
Date: Wed, 21-Aug-85 14:32:34 EDT
Article-I.D.: bcsaic.227
Posted: Wed Aug 21 14:32:34 1985
Date-Received: Sun, 25-Aug-85 03:56:16 EDT
References: <9793@ucbvax.ARPA> <323@looking.UUCP> <627@mit-vax.UUCP> <790@lll-crg.ARPA> <2063@ukma.UUCP>
Reply-To: pamp@bcsaic.UUCP (pam pincha)
Distribution: net.movies
Organization: Boeing Computer Services AI Center, Seattle
Lines: 33
Xref: watmath net.movies:7483 net.books:2212 net.sf-lovers:9702
Summary: 

In article <2063@ukma.UUCP> sean@ukma.UUCP (Sean Casey) writes:
>In article <790@lll-crg.ARPA> petrick@lll-crg.UUCP (Jim petrick) writes:
>>This discussion reminds me of an Isaac Asimov story about two scientists;
>>one a slow and cautious thinker, the other a quick, jump-to-conclusions
>>type.  The two are jealous rivals out to outdo each other.  The quick one
>>invents a device for nullifying gravity, and to show up his rival places
>>the device on the center of a pool table over a hole cut in the surface.
>>To embarass his rival, the quick guy invites the slow guy to demonstrate
>>what a great invention he has by shooting a pool ball across the hole in
>>the table (and through the null-gravity field).  The slow guy thinks a bit,
>>then makes a bank shot so the ball is headed directly at the fast guy as it
>>enters the field.  There is a flash, and the quick guy has a hole punched
>>through him by the ball (all gravity nullified, it was not accellerated
>>along with everything else in our frame of reference, and stayed put while
>>the rest of the world whooshed by).  
>
>That is ludicrous.  The world would whoosh by only if the ball were
>under a force that would cause it to de-accelerate.  If an antigrav
>field were maintained upon the ball, it would eventually leave the
>earth by centrifugal force, but not very quickly.
>
>For what you decribed to happen, the device would not only have to
>nullify gravity, but also place the ball in some relative movement such
>that the earth seemed to be whooshing by.
>-  Sean Casey				UUCP:	sean@ukma.UUCP   or
>-  Department of Mathematics			{cbosgd,anlams,hasmed}!ukma!sean
>-  University of Kentucky		ARPA:	ukma!sean@ANL-MCS.ARPA	

I suggest you send your comments to the "good Doctor" and
see what he has to come up with. He enjoys matching wits and
formulas given half the chance. (He also is a bit of a ham,
and loves attention and mail.)  You can send him a note thru   
his Sci-Fi magazine address.