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From: MJackson.Wbst@Xerox.ARPA
Newsgroups: net.physics
Subject: Re: Monkey Query
Message-ID: <714@sri-arpa.ARPA>
Date: Thu, 31-Oct-85 08:47:01 EST
Article-I.D.: sri-arpa.714
Posted: Thu Oct 31 08:47:01 1985
Date-Received: Sun, 3-Nov-85 15:27:08 EST
Lines: 13

From Rick McGeer:
"Not quite correct.  Since both the monkey and the rope weigh M, the
total mass on the rope is 2M, hence Fm = 2M(G + A) hence A = Fm/2M - G.

Picky, picky, picky."

Also wrong, wrong, wrong.  The Monkey exerts a force Fm on the
Rope/Weight system, and the Rope/Weight system exerts a force Fm on the
Monkey.  A = Fm/M -G is correct.  Consider the condition just before t =
0, when the Monkey is just holding himself up.  Surely then A = 0 and Fm
= MG.

Mark