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Homework Help: Pendulum Lab to find K

  1. Sep 30, 2009 #1
    1. The problem statement, all variables and given/known data
    We did a pendulum lab and found Q then we were asked to find K from that. The professor gave us a formula K= 4pi2/m2
    where m was the slope of a line on a graph of our periods vs lengthQ
    then stated it should be number we would recognize. I assumed maybe we were going to calculate g, as this is something I have done before but I thought K was a spring constant from Hookes law. What am I trying to find.

    2. Relevant equations


    3. The attempt at a solution

    The data is relative but I did get some answers around 9.77, close enough to 9.8 considering the human error involved.
  2. jcsd
  3. Sep 30, 2009 #2


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    Staff Emeritus
    Science Advisor
    Gold Member

    Perhaps your professor just relabelled the constants to give the element of surprise. It would be pretty obvious what it would be if he had used the standard g.
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