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Homework Help: Hooke's law

  1. Apr 18, 2010 #1
    1. The problem statement, all variables and given/known data
    This is a two part question.
    the graph is a force as a function of displacement
    first mass of an arrow= .002 kg
    marker= .01154 kg
    delta x= 0.7
    while x = 0.15.
    the coordinate points are (0,0) and (0.15, 9.5)

    1. Find K
    2. Find elastic energy (Ue)
    3. Find speed for the arrow and marker

    2. Relevant equations

    3. The attempt at a solution
    I tried using K= (mg)/x
    for both but i got :
    arrow= k= 0.1308

    and marker = K= 0.7547
    is this right?
    how do yo ufigure out the rest?
  2. jcsd
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