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Magnitude of thrust of rocket (q50)

  1. Nov 7, 2007 #1
    For this question:

    I just use ma=(3000-800)*20 =44kN to get the answer, and the answer is correct.
    and haven't make use of
    thrust=exhause velocity * dm/dt
    change in velocity=exhause velocity*ln|initial mass/final mass|

    So, just want to confirm am I solved this problem with correct approach, if not, what is the correct solution?
  2. jcsd
  3. Nov 7, 2007 #2


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    That's right. It's not really much of a rocket problem, is it?
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