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Human Cannonball Problem

  1. Oct 25, 2015 #1
    1. The problem statement, all variables and given/known data
    The Ringling Brothers are in town and Karl decides to audition to be the human cannonball. If Jay is shot out of a cannon at 45 degrees to the horizontal with an initial speed of 25 m/s. A net is positioned at a horizontal distance of 50 m from the cannon. At what height above the cannon should the net be placed in order to catch Jay?

    2. Relevant equations
    Kinematic Equations
    Not sure what else

    3. The attempt at a solution
    Stuck for the most part, I tried to divide into horizontal and vertical components.

    vo = 25
    v =
    Δx = 50
    a = 0
    t =

    vo = 0
    v =
    Δy = find
    g = 9.8
    t =

    Would I have to find Δy from the vertical component? Or is there something else I have to do?
  2. jcsd
  3. Oct 25, 2015 #2

    Simon Bridge

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    You find the delta-y by using physics - both components of the motion will be important.
    How long does it take Karl to reach the net?
    How high is he when he reaches the net?
  4. Oct 25, 2015 #3
    So...I would use the time from horizontal and then use it in the vertical component to find Δy?
  5. Oct 25, 2015 #4


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    Why not?
  6. Oct 25, 2015 #5
    TY all! :smile:
  7. Oct 26, 2015 #6

    Simon Bridge

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    Easy to check an idea in phydics... try it and see :)
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