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Rocket Question~need help~Max Velocty and Ff

  1. Nov 22, 2011 #1
    1. The problem statement, all variables and given/known data
    ok, so i need to find max velocity and force of friction of a model rocket. The rocket weights 83.8 g, accelerates at 5.78 m/ss. Its max height is 84.99 m. plz help


    2. Relevant equations
    ok for Ff = μkFn
    as for Vmax i have no idea


    3. The attempt at a solution
    ok so i found Fn = 82.266 N cuz u have to convert grams to kg. Thats all i can figure out.
     
  2. jcsd
  3. Nov 22, 2011 #2
    a little confused.

    is the acceleration constant?

    if so then how does it have a max height if it is constantly accelerating?

    or is it an initial acceleration?
     
  4. Nov 23, 2011 #3
    the question is related to my model rocket we launched a week ago, the accceleration is average from initial to the max height. dont know if that makes sense.
     
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