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Topic: This Week's Finds in Mathematical Physics (Week 140)
Replies: 10   Last Post: Oct 27, 1999 9:53 PM

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 Jeremy Boden Posts: 1,313 Registered: 12/6/04
Re: This Week's Finds in Mathematical Physics (Week 140)
Posted: Oct 25, 1999 5:37 PM

In article <barnabyfinch-2210991703210001@c1p130.idl.pe.net>, Barnaby
Finch <barnabyfinch@pe.net> writes
>In article <7updac\$d0r\$1@info.service.rug.nl>, p.helbig@jb.man.ac.uk wrote:
>

>> The problem being: Two trains are 60 miles apart and approaching each
>> other at 30 miles per hour. There is a fly flying between the
>> cowcatchers of each train, at 60 miles per hour, back and forth, turning
>> around immediately. What is the total distance covered by the fly
>> (relative to the ground, NOT taking the motion in opposite directions to
>> cancel) until the trains hit?

>
>60 miles?
>
>Barnaby
>
>[Moderator's note: Further discussion of this puzzle doesn't belong on
>sci.physics.research, unless some additional physics content can be
>injected. I would suggest that the thread be redirected to
>rec.puzzles, but I think that bringing up an old chestnut like this
>there would elicit some flames. -TB]

60/30 = 2 hours @ 60mph = 120 miles.

--
Jeremy Boden

Date Subject Author
10/16/99 john baez
10/18/99 Charles Francis
10/18/99 Ralph Frost
10/21/99 Christopher Hillman
10/22/99 Phillip Helbig
10/23/99 Christopher Hillman
10/25/99 ian
10/26/99 Kresimir Kumericki
10/27/99 MARK FERGERSON
10/25/99 Barnaby Finch
10/25/99 Jeremy Boden