Article View: sci.physics
Article #7385Re: A Question
From: Alan W. Paeth
Date: Thu, 06 Nov 1986 22:27
Date: Thu, 06 Nov 1986 22:27
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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
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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: arc1-ca.pugleaf.net!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