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Article #21

Re: Running in the rain

#21
From: Edwin Schweber
Date: Mon, 22 May 1995 00:00
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Stephen Jacobsen wrote
>
>Does anyone have a sensible solution to the old puzzle about
>whether one stays drier by walking in the rain or running to a
>destination?  I vaguely remember seeing an article on the subject
>somewhere a few years ago.  Any ideas where?
>
Stephen,

   Rather than approach the problem in the usual way
by thinking in terms of the relative velocity of the
rain drops, I approach it by thinking in terms of the
total velocity traced out by the runner's body as he
runs his route. All the raindrops in that volume will
strike him and make him wet

   But if the rain is falling at a constant rate, the number of
rain drops per unit volume will be constant. And since the
runner traces the same volume whether he walks or runs, he should
get equally wet both ways.

   However, this does neglect the raindrops falling on the runner's
head. Obviously more raindrops will hit him if we walks slowly. So in
this sense, it is more asvantageous to run. Besides running allows you
to get home and dry off more quickly.

  Hope this helps.

Ed Schweber
e-mail: EdSchweb@ix.netcom.com
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From: Edwin Schweber <edschweb@IX.NETCOM.COM>
Subject: Re: Running in the rain
Date: 1995/05/22
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