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- Path: sparky!uunet!gatech!news.ans.net!cmcl2!adm!claudius!tcora
- From: tcora@PICA.ARMY.MIL (Tom Coradeschi (FSE) <tcora>)
- Newsgroups: sci.space.shuttle
- Subject: Re: Physics/Shuttle Question
- Message-ID: <1993Jan21.135535.23076@pica.army.mil>
- Date: 21 Jan 93 13:55:35 GMT
- References: <1993Jan19.235621.13674@mnemosyne.cs.du.edu> <1993Jan20.163950.4219@muddcs.claremont.edu>
- Sender: news@pica.army.mil (USENET Special Account <usenet>)
- Organization: Electric Armts Div, US Army ARDEC, Picatinny Arsenal, NJ
- Lines: 29
- Nntp-Posting-Host: claudius
-
- mperlman@nyx.cs.du.edu (Marshal "Airborne" Perlman) writes:
- >I am not a big physics fan, so maybe one of you can answer this in
- >plain english for us non-NASA [as of now, =8)] people.
- >
- >In microgravity, the weight of 'stuff' is less (quite less). And more then
- >once I've seen astronauts handle objects of much mass (and if on earth,
- >much weight) like they were feathers. OK, fine I understand that. BUT
- >what allows the shuttle to not be effected by this? For example. If
- >astronaut bob was standing in the shuttle, and grabbed a big-ol satellite,
- >he reaches out and grabs it... ok? But what doesn't stop astronaut bob from
- >accidently grabbing the shuttle or something? and turning it end over end?
- >
- >I am sure there is some simple answer to this, but I cannot think of it
- >now.
-
- Consider that the mass of the object remains constant. And that any
- momentum (linear or angular) is a mass-velocity product. Your ability to
- move an object is going to be a function of this relationship. This is why
- the sattelite rescue last year involved VERY slow movement of the object
- once it was captured. The orbiter has substantial mass, and the bottom
- line is that any attempt by an astronaut to "shove" the orbiter will
- simply result in the astronaut moving. The same thing holds true on earth.
- Stand up and press down with your feet real hard. Have you moved the earth
- in orbit? No. You moved yourself up in the air. Lack of gravity doesn't
- really change the way it all works.
- --
-
- tom coradeschi <+> tcora@pica.army.mil
- Loud Pipes Suck
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