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Homework Help: Spring problem

  1. Jan 21, 2007 #1

    lzh

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    1. The problem statement, all variables and given/known data
    A(n) 97.6 g ball is dropped from a height of
    58.7 cm above a spring of negligible mass.
    The ball compresses the spring to a maximum
    displacement of 4.60282 cm.
    The acceleration of gravity is 9.8 m/s2 :


    2. Relevant equations
    mgh
    .5k(deltax)^2


    3. The attempt at a solution
    I first converted all grams to kg, and cm to m:
    97.6g=.0976kg
    58.7cm=.587m
    4.60282cm=.0460282m
    then:
    mgh=.5k(deltax)^2
    (.0976g)(9.8m/s^2)(.587m)=.5k(.0460282m)^2
    k=530N/m

    I really dont see what i could've done wrong, but this isn't the right answer, according to my hw service
     
  2. jcsd
  3. Jan 21, 2007 #2

    radou

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    Homework Helper

    Hint: you took the wrong h.
     
  4. Jan 21, 2007 #3

    lzh

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    lol, i forgot to add deltax to h
     
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