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- Newsgroups: sci.space.shuttle
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!caen!uvaarpa!vdoe386!ghasting
- From: ghasting@vdoe386.vak12ed.edu (George Hastings)
- Subject: Re: Physics/Shuttle Question
- Message-ID: <1993Jan23.001830.184@vdoe386.vak12ed.edu>
- Organization: Virginia's Public Education Network (Richmond)
- References: <1993Jan19.235621.13674@mnemosyne.cs.du.edu>
- Date: Sat, 23 Jan 93 00:18:30 GMT
- Lines: 21
-
-
- You must also remember that the moment that the Canada Arm RMS,
- or astronaut Bob, attached by his feet ps to the shuttle, grabs
- something, then the shuttle, the astronaut, and thething
- grabbed are, as far as the physics dynamics are concerned, a
- single object whose center of mass if now slightly different
- than before.
- If astronaut Bob or the RMS movese object, such as a
- satellite, there is ALWAYS an equal and opposite movement. The
- amount of opposite movement is determined by the relative
- masses of the two objects and the length of the lever-arm doing
- the moving.
- I was doing weightlessness training aboard an IL-76 MDK over
- Star City, Russia, it was easy to move a 200 KG mass as long as
- my feet were secury tucked under restraining ropes between the
- floormats, but when I attempted it floating in mid-air, I moved
- myself more than twice the distance that I was able to move the
- mass itself...both sides of the equation balance!
-
-
- ---
-