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Free Fall/Constant Acceleration Problem

  1. Nov 13, 2009 #1
    1. The problem statement, all variables and given/known data
    A rocket is fired vertically and ascends with a constant vertical acceleration of 20.0 m/s^2 for 2.00 seconds. Its fuel is then used up and it continues as a free object. What is the maximum altitude reached?


    2. Relevant equations
    X=Xo+Vot+(1/2)at^2
    V=Vo+at
    2a(X-Xo)=V^2-Vo^2


    3. The attempt at a solution
    I don't know how to solve for the point at which the rocket runs out of fuel. Once I can do that I think I will be able to find the maximum altitude reached as it asks in the problem.
     
  2. jcsd
  3. Nov 13, 2009 #2

    Pengwuino

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    Gold Member

    They tell you at what time the rocket runs out of fuel. Use this to determine the height and velocity that the rocket is at when the fuel runs out.
     
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