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Homework Help: Minimum stopping distance problem

  1. Jul 4, 2005 #1
    A load of steel of mass 6000kg rests on the flatbed of a truck. It is held in place by metal brackets that can exert a maximum horizontal force of 8000 N. When the truck is traveling 20 m/s, what is the minimum stopping distance if the load is not to slide forward into the cab?
     
  2. jcsd
  3. Jul 4, 2005 #2
    ok here how i did it,.....im gettin an answer of 150m

    first find the acceleration in the negative x direction the brackets can exert which is.
    8000=(6000)a

    a= -1.33


    then find the time it takes to stop using v=vo +at

    0= 20 + (-1.33) t t= 15sec


    then find distance using x=xo +vot+.5at^2



    x = 20(15) + .5(-1.33)(15)^2

    x=150m
     
  4. Jul 4, 2005 #3
    Thanks PN

    Hey PHYSICS NOOB, I really appreciate the help. I worked the problem before coming on the forum and did'nt think that I was doing it correct. Thanks in advance again and for the fast response.
     
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