# Calculate speed of vehicle vs distance of pedestrian traveled

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.

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## Answers and Replies

Simon Bridge
Homework Helper
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.

Aside:
You appear to want to know how fast a vehicle was going from the distance a pedestrian was thrown.
Typical approaches include:
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.

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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.