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- From: u108502@beta.lanl.gov (Andrew Poutiatine)
- Newsgroups: sci.physics
- Subject: Re: satellite orbits
- Message-ID: <1993Jan26.160210.13202@newshost.lanl.gov>
- Date: 26 Jan 93 16:02:10 GMT
- References: <376oXB3w165w@netlink.cts.com> <1993Jan21.213632.3246@newshost.lanl.gov> <1993Jan22.015334.9290@leland.Stanford.EDU>
- Sender: news@newshost.lanl.gov
- Organization: Los Alamos National Laboratory
- Lines: 33
-
- In article <1993Jan22.015334.9290@leland.Stanford.EDU> ledwards@leland.Stanford.EDU (Laurence James Edwards) writes:
- >In article <1993Jan21.213632.3246@newshost.lanl.gov>, u108502@beta.lanl.gov (Andrew Poutiatine) writes:
- >|> In article <376oXB3w165w@netlink.cts.com> bigbro@netlink.cts.com (Kenneth Sullivan) writes:
- >|> >Quick easy question, this is mostly to settle an arguement
- >|> >
- >|> >a.)what keeps a satellite in orbit
- >|> >and
- >|> >b.)just how wrong is the idea of centrifugal/centripidal "force"?
- >|> >thanks
- >|> >
- >|> [...]
- >|> If the satellite is moving too slowly initially to maintain a stable orbit,
- >|> then it falls, speeding up, until a stable orbit is maintained, unless of
- >|> course it enters the atmosphere or hits the ground or something.
- >|>
- >|> The gravitational force is toward the Earth, and is hence a centripital force.
- >|> In this simple example there is no centrifugal force.
- > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- >If the earth exerts a centripetal force on the satellite I would think the
- >satellite exerts a centrifugal force on the earth, as you mention subsequently
- >with the example of the ball and string.
- >
- >Larry Edwards
-
- Yes, you would be right to think this. I should have been more clear on what
- in fact I meant, but I did not think anyone in this newsgroup could mis-
- understand what I was saying. I meant that in the simple example described,
- and considering _only_ the satellite, and the forces acting on it.
-
- By the way, how on Earth did you learn to pick nits in such a competent manner?
-
- -AIP
-
-