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Rocket run out of fuel

  1. Sep 19, 2010 #1

    afa

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    1. The problem statement, all variables and given/known data

    A rocket rises vertically, from rest, with an acceleration of 4.0 until it runs out of fuel at an altitude of 1500 . After this point, its acceleration is that of gravity, downward.
    How long does it take to reach this point?

    What maximum altitude does the rocket reach?

    How much time (total) does it take to reach maximum altitude?
    With what velocity does the rocket strike the Earth
    How long (total) is it in the air?

    2. Relevant equations

    x=x+vt+.5at^2

    3. The attempt at a solution

    I found velocity when it runs out of fuel to be 110m/s dont know how to get the rest??
     
  2. jcsd
  3. Sep 19, 2010 #2
    We need more units! I'm guessing acceleration of 4.0m/s and an altitude of 1500 meters?
     
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