Acceleration question

  1. What acceleration does a rocket need to reach speed of 200 m/s at height of 1.0km. I know that acceleration is velocity over time but I have only velocity and distance. :confused:
     
  2. jcsd
  3. VietDao29

    VietDao29 1,422
    Homework Helper

    So how about the formula:
    [tex]v_f ^ 2 = v_i ^ 2 + 2ad[/tex]? Do you know this formula?
    Can you go from there? Remember to change 1.0 km into 1000m.
    Viet Dao,
     
  4. That is calculus. Would you mind telling me those variables.
     
  5. VietDao29

    VietDao29 1,422
    Homework Helper

    a : acceleration (m / s ^ 2) = ?.
    d : displacement (m) = 1000 m.
    v_i : initial velocity (m / s) = 0 m / s (The object accelerates from rest).
    v_f : final velocity (m / s) = 200 m / s.
    Can you go from here?
    By the way, I think it is physics, not calculus...
    Viet Dao,
     
  6. O thanks. I tried to look it up in some later chapters but found formulas involving derivations. I didn't know what those variables were so I guessed that you have to use calculus to find way to do it. Thanks for help. :smile:
     
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