Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!decwrl!Glacier!oliveb!hplabs!sri-unix!MJackson.Wbst@Xerox.ARPA 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