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Transformations of Energy in a Pendulum Type Experiment

  1. Apr 1, 2012 #1
    1. The problem statement, all variables and given/known data

    The string in Fig. 8-35 is L = 120 cm
    long, has a ball attached to one end, and is
    fixed at its other end. The distance d to the
    fixed peg at point P is 75.0 cm. When the
    initially stationary ball is released with the
    string horizontal as shown, it will swing
    along the dashed arc. What is its speed
    when it reaches
    1.What is the tension of the string at the final position (answer in terms of m, g, L, a)
    2. What is the minimum value ofd so the ball will reach the final position (answer in the same terms)

    Link: http://www.nevis.columbia.edu/~sciulli/Physics1401/homeworks/HW4.pdf

    2. Relevant equations

    Ep=mgL ; Ek=mv^2/2

    3. The attempt at a solution

    1. Fu=T-mg
    Fu=T-9.8a
    ma=T-9.8a
    T=ma+9.8a ? T=ma+ga

    2.Cannot understand
    Thanks
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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