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P or E

  1. May 13, 2005 #1
    I am developing a rubbery serpentine wall as a highway median barrier and I need to know the tensile strength necessary to hold against a 4400 lb pickup moving 62.5 mph. Using an excel spreadsheet and iterations, I subtract the momentum of the wall from that of the pickup at 2 foot intervals until the pickup stops, and then I examine the calculations during each two foot interval for the highest amount of force transferred to the wall. The wall has some thickness and weight, and it sits loosely on the ground, so I also factor in friction. But should I use Kinetic Energy instead of momentum to determine the highest amount of force on the wall during each two foot interval?
  2. jcsd
  3. May 13, 2005 #2
    I would use KE, that way you can factor in the friction force to the ground alot easier.
    I would wait for an expert to help you out though.
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