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Trying to Find Center of Gravity on Semi Truck (a real one)

  1. Oct 20, 2008 #1
    Trying to Find Center of Gravity on Semi Truck (a real one)!!

    1. The problem statement, all variables and given/known data

    For one of my classes I have to prove, using very basic physics, that a scene from a movie is very unrealistic. So my group chose the "truck flip scene" from Batman Dark Knight.

    I am desperately searching to fond a site that can provide me with the approximate location of the center of gravity of a tractor-trailer truck. I don't care what kind of truck or whether it is filled to capacity or if it's empty...I just need something with a number and possibly a picture.

    I have tried googling so many different key phrases that I want to scream. I have tried "center of mass of semi trailer" "center of mass of tractor trailer" "center of gravity of semi trailer" "center of gravity of tractor trailer"

    and countless variations.

    I know that it is obnoxious to outright ask someone to google it for me, but I could really use some advice on how to refine my search better.

    Any pointers would be greatly appreciated.

    Casey
     
  2. jcsd
  3. Oct 20, 2008 #2
    Re: Trying to Find Center of Gravity on Semi Truck (a real one)!!

    My eyes feel like they are going to bleed. Any ideas?
     
  4. Jan 5, 2009 #3
    Re: Trying to Find Center of Gravity on Semi Truck (a real one)!!

    Wow.... i am actually doing the exact same thing for my physics summative (grade 12) and need the approximate center of mass as well....

    For the other stats on the semi i have:
    avg length: 75 feet = 22.86 meters
    avg unloaded weight: 14 000 kilograms = 30 864.7167 pounds

    Tensile strength of steel (for batman's cables): 1860MPa
    Tensile strength of carbon nanotube rope (incase Batman has miraculously advanced this new technology): 62000MPa

    What was your estimate on the truck's speed? I was thinking 60 km/h... but im not too sure on that.
     
  5. Jan 5, 2009 #4
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