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Maximum altitude of a rocket if launched vertically

  1. Aug 13, 2010 #1
    1. The problem statement, all variables and given/known data

    The missile has maximum horizontal range of 160km. What is the maximum altitude it can reach if launched vertically?

    2. Relevant equations

    v2=u2 +2as

    3. The attempt at a solution

    v=0 (because the velocity is zero when it is not rising anymore)
    u=0
    a= -9.8 (up is the positive direction
    s= the answer, the height

    That is how I thought I am supposed to do it...

    By the way you guys do a great job on these forums, I lurk here a lot :)
     
  2. jcsd
  3. Aug 13, 2010 #2
    You can extract the information you need from that line. How do you achieve maximum horizontal distance with a projective under gravity?

    Also are you sure initial velocity, u, should be zero?
     
  4. Aug 13, 2010 #3
    apply the formula for calculating the maximum range. From there u will get the Velocity of the projectile.
     
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