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Homework Help: What is the force constant of its rear suspension

  1. Sep 23, 2004 #1
    Problem-
    A 110-kg box is loaded into the trunck of a car. If the higher of the car's bumber decreases by 13cm, what is the force constant of its rear suspension?

    answer-

    i know the formula is Fx= -k(x)
    since Fx= 110 x 9.81
    (110 x 9.81)/.13 =kN/m
    i get = 8300.77
    but the answer in the back of the book is 8.3kn/M
    am i doing something wrong? please help
     
  2. jcsd
  3. Sep 23, 2004 #2
    You have it absolutely correct.

    8300 N/m = 8.3 kN/m

    kN is kilonewtons, ie 10^3 Newtons
     
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