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- Newsgroups: sci.physics
- Path: sparky!uunet!stanford.edu!nntp.Stanford.EDU!leland.Stanford.EDU!ledwards
- From: ledwards@leland.Stanford.EDU (Laurence James Edwards)
- Subject: Re: satellite orbits
- Message-ID: <1993Jan22.015334.9290@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: DSG, Stanford University, CA 94305, USA
- References: <376oXB3w165w@netlink.cts.com> <1993Jan21.213632.3246@newshost.lanl.gov>
- Date: Fri, 22 Jan 93 01:53:34 GMT
- Lines: 22
-
- 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
-