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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.physics
Subject: Re: Monkey business
Message-ID: <3250@brl-tgr.ARPA>
Date: Fri, 15-Nov-85 06:12:42 EST
Article-I.D.: brl-tgr.3250
Posted: Fri Nov 15 06:12:42 1985
Date-Received: Sat, 16-Nov-85 03:46:36 EST
References: <2748@brl-tgr.ARPA> <24400048@uiucdcs>
Organization: Ballistic Research Lab
Lines: 13

> Well, I pondered, and came to the conclusion that you can't read very well.
> Re-read the statement of the problem - the system is NOT unstable, the
> angular momentum of the pulley, the density of the rope, and the moment of
> intertia of the pulley are all ZERO. The key words are: MASSLESS rope,
> MASSLESS, FRICTIONLESS pulley.

I read just fine; my first (of two) postings acknowledged
the original statement of the problem.  THAT IS EXACTLY
THE SYSTEM THAT IS UNSTABLE.  My consideration of actual
physics instead of unrealizable idealizations is an attempt
at "symmetry breaking", to make the problem attain a
well-determined solution.  After all, this is net.physics,
not net.puzzle.