Space Forum / Space Flight / December 2009

Well, not having received any negative responses
to my original query in sci.space.policy, concerning
Virgin Galactic, here goes.
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I thought I understood  basic gravity problems but the following high
school physics problem from my daughter has me stumped ( I think)
Q. a disabled ( meaning of disable not defined) satellite of mass
2400kg  is in orbit at a ht of 2000 km above the earth  at a speed of