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Rocket Lab @ Angles.

  1. Oct 6, 2008 #1
    1. The problem statement, all variables and given/known data

    I need to predict how far a rocket will land given:

    Delta Y = 2.032 (80 in ) - Height it will be shot from.
    Angle - 35 (degrees)
    My Average velocity is 23.3 m/s.

    I need to repeat this for angles 40-60 [Increments of 5]

    2. Relevant equations

    I have these equations that i am using.

    Vy = V(average) x sin (theta)
    Vx = V(average) x cos (theta)
    X = V(average) x cos (theta) * Time
    T = (2*V(average))/ g

    3. The attempt at a solution

    For the first scenario i did the calculations and i am getting 55.3 m, but i know that is not right because we shot the rockets today, and mine did not even go past 40m. I did 3 trials, and each time it was between 20-40 m.
  2. jcsd
  3. Oct 6, 2008 #2


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    Maybe the 23m/s is not accurate?
  4. Oct 6, 2008 #3
    I believe that it is accurate because i compared these results with the same lab we did last year, and the answer is close.
  5. Oct 6, 2008 #4


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    Perhaps you would do better to use a range equation that was more of the form:

    [tex]Range = \frac{V_o^2*Sin2\theta}{g}[/tex]

    This of course does not take into account the height you launch it from.
  6. Oct 6, 2008 #5
    See, even with that equation, my answers comes in the 50's like my original.
  7. Oct 6, 2008 #6


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    Unfortunately it doesn't take into account how long the rocket burns. Since it is a rocket it will accelerate over a distance that may be greater than 2m.
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