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Maximum speed for pendulum problem

  1. Jan 21, 2007 #1
    1. The problem statement, all variables and given/known data
    A pendulum of length 1.0cm is raised 15cm. What is the maxium speed it can reach the bottom.


    2. Relevant equations
    I have no clue. All i know is that v1 is zero.


    3. The attempt at a solution
    i need help to get started
     
  2. jcsd
  3. Jan 21, 2007 #2

    Integral

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    I am having trouble understanding the situation. How do you raise a 1cm pendulum 15cm? Please check your post for typos.. could it be a 1m pendulum?
     
  4. Jan 21, 2007 #3
    pendulum

    the pendulum length is 1.0m
    my bad
     
  5. Jan 21, 2007 #4
    Maybe conservation of energy? Kinetic and potential?
     
  6. Jan 21, 2007 #5
    energy is correct. good.
    So because of the way they wrote the queston, it's very easy.
    :)
     
  7. Jan 21, 2007 #6

    Kurdt

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    At equilibrium (i.e. the bottom in this question), all the potential energy has been converted to kinetic energy.
     
  8. Jan 21, 2007 #7
    do i use the Ek=mv2
     
  9. Jan 22, 2007 #8

    Kurdt

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    That is not the kinetic energy equation. [tex] E = \frac{1}{2} mv^2[/tex]
     
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