From: sylvia@not.at.this.address   
      
   Dr J R Stockton wrote:   
   > In sci.space.tech message <97af933c-beda-4dba-aa2e-81364d4202ef@e20g2000   
   > vbc.googlegroups.com>, Tue, 9 Jun 2009 06:09:45, dotcom   
   >  posted:   
   >   
   >> I quoted the problem verbatim from my daughters text book.   
   >   
   > In that case, assuming that you actually understand and mean "verbatim",   
   > move the daughter to a different school - one that uses a better grade   
   > of textbook.  What you gave cannot be verbatim from a well-written book.   
   >   
      
   It's not so bad. Although its stated initial speed corresponds to a   
   circular orbit at 2000km (apparently, I haven't checked), the question   
   doesn't say that the satellite is in such an orbit. It does say that it   
   falls to a height of 800km.   
      
   So the reasonable assumption is that it's in an orbit that allows it to   
   be at 2000km at one point in time, and 800km at another.   
      
   Sylvia.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)