[geocentrism] Chatter Re: acceleration calcs attachment
- From: Paul Deema <paul_deema@xxxxxxxxxxx>
- To: geocentrism@xxxxxxxxxxxxx
- Date: Wed, 7 May 2008 16:08:02 +0000 (GMT)
Philip M
Oh! Me! I knew that! Me! Me!
Well it isn't all that positive of course. I had always thought that a body would float at the centre of the Earth (or other body) but until the early '70s, I mistakenly believed that the body floating at the centre would -- must -- be a perfect sphere by virtue of gravitational attraction being defined by Gm1m2/d^2. If Gm1m2 was non zero and d was zero, then the attraction would be infinite. That was until someone wiser than I pointed out that the attraction of the matter above would be equal and opposite to the attraction of the matter below, that to the right equal and opposite to that to the left and the same for that in front and that behind.
But it did crystallise the 'zero gravity at the centre' concept, so it wasn't a complete loss.
Paul D
----- Original Message ----
From: philip madsen <pma15027@xxxxxxxxxxxxxx>
To: geocentrism list <geocentrism@xxxxxxxxxxxxx>
Sent: Tuesday, 6 May, 2008 11:34:58 PM
Subject: [geocentrism] Re: acceleration calcs attachment
From: philip madsen <pma15027@xxxxxxxxxxxxxx>
To: geocentrism list <geocentrism@xxxxxxxxxxxxx>
Sent: Tuesday, 6 May, 2008 11:34:58 PM
Subject: [geocentrism] Re: acceleration calcs attachment
No worries Paul.. I pulled out of the discussion. As not having fallen a long enough distance in any tin box, nor ever experienced being in orbit, I am not really qualified to speak on the subject, without presuming that everybody in the sciences of physics since the beginning of time are liars..
Meanwhile I did find this interesting article on weightlessness, which shows I did not know everything.. http://en.wikipedia.org/wiki/Weightlessness and that a lot of us loosely apply terminology.. How many times have we encountered that?
eg "Weightlessness (roughly speaking) occurs when" and
In the center of a planet a person would feel weightless because the pull of the surrounding mass of the planet would cancel out. More generally, the gravitational force is zero everywhere within a hollow spherically symmetrical planet, by the shell theorem.
Doesn't that open the mind to what happens to pressure , something I have never thought about. Without thinking I would have said the highest pressure would be at the centre.. Totally wrong.. Hmmm. \
Philip.
----- Original Message -----From: Paul DeemaSent: Wednesday, May 07, 2008 5:22 AMSubject: [geocentrism] Re: acceleration calcs attachmentPhilip MSorry if I pre-empted you there. I assure you I in no way doubted your competance -- I just got a bit annoyed and spontaneously jumped in.But your question? Yes I did. It's embarrasing when you criticise something your adversary didn't say. I don't pretend to have comprehended it all though.Paul D
----- Original Message ----
From: philip madsen <pma15027@xxxxxxxxxxxxxx>
To: geocentrism@xxxxxxxxxxxxx
Sent: Monday, 5 May, 2008 9:18:49 PM
Subject: [geocentrism] Re: acceleration calcs attachment
So I ask -- what part of this do you not understand?Paul D
Ok Paul, ....This is what i do not understand......read in full..............
HO! HO! You didn't did you, Paul?
Phil
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