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Calculate speed of vehicle vs distance of pedestrian traveled

  1. Sep 23, 2014 #1
    WIN_20140923_191738.JPG I would like to calculate the above. Here are the factors. This has real life repercussions, and if further variables are required I will provide them if possible.

    Vehicle weight (x=4986LB) includes 120LB driver, plus 50lb child and 60lb child
    Pedestrian weight (p=320LB)
    speed of vehicle (v=?)
    distance p traveled (d=90ft)
    difference in height (h=15ft) lower than impact because impact was on a hill and p landed in ditch
    time (t=?)
    acceleration (a=?)
    gravity (g=9.81m/s squared)

    please include formula/s used and how they applied. Thanks in advance.
    Last edited: Sep 23, 2014
  2. jcsd
  3. Sep 23, 2014 #2

    Simon Bridge

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    It sounds like you are trying to make a case for something in real life.
    This is not a good forum to do this in.

    Since this is important, you should employ a professional crash-scene or scene-of-accident investigator.

    You appear to want to know how fast a vehicle was going from the distance a pedestrian was thrown.
    Typical approaches include:
    http://jneades.com/downloads/Pedestrian%20throw.pdf [Broken]
    http://autoaccidentreconstructionguide.com/pedestrian-collision-investigators-guide-in-investigating-pedestrian-collisions/ [Broken]
    ... care has to be taken with these as there may be forces acting other than the impact and gravity.
    Last edited by a moderator: May 7, 2017
  4. Sep 23, 2014 #3
    You are correct, and I agree this may not be the best place, and I apologize for that. Perhaps there is a "good" place somewhere, I just haven't found it yet.

    The investigation is over as far as they are concerned, and they did not complete certain areas of investigation, like indicated above. This is why I am here.

    You have given me a few leads, I will do my best with that. Thanks.
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