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Thread: Truck Driver Math

  1. #1
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    Default Truck Driver Math

    Math Story / Problem:


    A Backhoe weighing 8 tons is on top of a flatbed trailer and heading
    East on Interstate 70 near Hays, Kansas.



    The extended shovel arm is made of

    Hardened refined steel and the approaching overpass is made of
    Commercial-grade concrete, reinforced with 1 1/2 inch steel rebar
    Spaced at6 inch Intervals in a crisscross pattern layered at 1 Foot Vertical spacing.

    Solve:

    When the shovel arm hits the overpass, how fast
    Do you have to be going to slice the bridge in half?
    (Assume no effect for headwind and no breaking by the clueless
    Driver.)

    Extra Credit:

    Solve for the time and distance required for the entire rig to come to
    A Complete stop after hitting the overpass at the speed calculated
    Above.

    (No... You can't consult the driver;

    He is still trying to figure out what happened himself.)
    And, yes, the Backhoe seems to be fine.


    image003.jpg


    image002.jpg
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    Takai's Avatar
    Takai is offline
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    Default Re: Truck Driver Math

    I thought that they were just doing a modern remake of JAWS.
    "Change is not necessary...Survival is not mandatory" - W. Edward Deming

    "When I hit....I hit the whole enchilada" - Master David Leung

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    Default Re: Truck Driver Math

    I've seen this before and it still kills me....
    "Fear is the true opiate of combat."

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    John Brewer's Avatar
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    Default Re: Truck Driver Math

    When the shovel arm hits the overpass, how fast
    Do you have to be going to slice the bridge in half?
    (Assume no effect for headwind and no breaking by the clueless
    Driver.)

    I would say he had at least a twelve pack.

    Extra Credit:

    Solve for the time and distance required for the entire rig to come to
    A Complete stop after hitting the overpass at the speed calculated
    Above.

    Probably another six pack.

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