Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site sdcrdcf.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!oliveb!hplabs!sdcrdcf!alan From: alan@sdcrdcf.UUCP (Alan Algustyniak) Newsgroups: net.physics Subject: Re: Newton's Second Law Message-ID: <2136@sdcrdcf.UUCP> Date: Mon, 8-Jul-85 15:34:18 EDT Article-I.D.: sdcrdcf.2136 Posted: Mon Jul 8 15:34:18 1985 Date-Received: Sat, 13-Jul-85 08:07:51 EDT References: <9255@Glacier.ARPA> <1182@mnetor.UUCP> Reply-To: alan@sdcrdcf.UUCP (Alan Algustyniak) Distribution: net Organization: System Development Corp. R+D, Santa Monica Lines: 19 Summary: In article <1182@mnetor.UUCP> fred@mnetor.UUCP (Fred Williams) writes: > > Newton's second law really defines a relationship between mass, >force, and the "time rate of change of momentum". I believe Newton >himself expressed it as; > > dp > F = ---- > dt > I wrote that it was a great day, When Newton said,"F is ma." Alas, he did not; He said."F is p-dot." And my doctorate drifted away. Josef Solomon (In a letter in a very old issue of "Physics Today")