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Homework Help: Rocket fuel consumption too easy?

  1. Nov 12, 2008 #1
    1. The problem statement, all variables and given/known data
    Rocket with fuel mass of m(initial)
    Rocket without fuel is m(final)
    Time for fuel to be used up is t(final)


    2. Relevant equations
    What is m(t) (slope of m vs t graph)
    (i assume t(initial) is zero

    3. The attempt at a solution

    [((m(final) -m(initial)) / t(final)]t + m(initial) for interval 0<t<tf

    just mx+b?
     
  2. jcsd
  3. Nov 12, 2008 #2
    That's true if mass is lost at a constant rate.
     
  4. Nov 12, 2008 #3
    Yes, that was given too.
    Our other assignment page is covered in derivatives and integrals, but my answer for this one was simple math, so I was worried I had it wrong. :)
     
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