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From: jerry@oliveb.UUCP (Jerry Aguirre)
Newsgroups: net.physics
Subject: Re: Dean Drive Possible?
Message-ID: <329@oliveb.UUCP>
Date: Mon, 23-Apr-84 16:03:23 EST
Article-I.D.: oliveb.329
Posted: Mon Apr 23 16:03:23 1984
Date-Received: Thu, 26-Apr-84 01:04:46 EST
References: <12309@sri-arpa.UUCP>
Organization: Olivetti ATC, Cupertino, Ca
Lines: 12

Granted that no amount of pushing and shoving will result in a net
change of momentum unless there is something outside to push against.

Does the same restriction apply to angular momentum?  Given an object
suspended in space with no internal motion.  Is it possible to spin up a
gyroscope, precess it a bit, brake it back down, and result in a net
rotational motion?  The restriction here is that you must restore the
state of no internal motion.  Is this guaranteed to cancel out all spin
imparted to the object?

					    Jerry Aguirre
    {hplabs|fortune|ios|tolerant|allegra|tymix}!oliveb!jerry