Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site watcgl.UUCP
Path: utzoo!watmath!watnot!watcgl!awpaeth
From: awpaeth@watcgl.UUCP (Alan W. Paeth)
Newsgroups: sci.physics
Subject: Re: A Question
Message-ID: <128@watcgl.UUCP>
Date: Thu, 6-Nov-86 17:27:13 EST
Article-I.D.: watcgl.128
Posted: Thu Nov  6 17:27:13 1986
Date-Received: Fri, 7-Nov-86 21:41:20 EST
References: <230@sri-arpa.ARPA> <572@epimass.UUCP>
Reply-To: awpaeth@watcgl.UUCP (Alan W. Paeth)
Organization: U of Waterloo, Ontario
Lines: 16

In article <187@cartan.Berkeley.EDU> gsmith@brahms (Gene Ward Smith) writes:
>In article <590@husc6.HARVARD.EDU> hadeishi@husc4 (mitsuharu hadeishi) writes:
>
>>for example, after accelerating for 1 year at 1 gravity you can approach
>>the speed of light to well within 1% (as measured from Earth.)
>
>  According to my quick calculation, g = 1.0325 ly/year^2, and so after
>one year at one g, one is going tanh(1.0325) = .775c.

When one hits a velocity of sqrt(.5) =~ .7071c then the Lorentz equation
gives a dilation of sqrt(2)=1.414, so the "ground made good" as seen by
someone in the spaceship is exactly 1.00c.

Now .7071 isn't .775 to within a percent, but perhaps this is what was meant.

    /Alan Paeth