1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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. :)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook