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Homework Help: Motion Acceleration Equations

  1. Sep 13, 2011 #1
    1. The problem statement, all variables and given/known data

    Within 4 sec of liftoff, a spacecraft that is uniformly accelerating straight upward from rest reaches an altitude of 450 m [up]. What is the spacecraft's acceleration?

    2. Relevant equations

    The five key equations, plus the velocity, speed, and acceleration equations

    3. The attempt at a solution

    I don't know what the altitude would be (Displacement? Distance?), so I can't solve the equation with the five key equations.
  2. jcsd
  3. Sep 13, 2011 #2


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    Homework Helper

    Do you know an equation from the key equations that involves displacement+velocty+time+acceleration?

    Hint: displacement = ??
  4. Sep 13, 2011 #3
    Thank you so much!
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