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A Simple Pendulum and Friction problem

  1. Feb 9, 2004 #1
    Im supposed to calculate the work done by the frictional force on a simple pendulum after one period. I have to use the following equation to do this calculation.

    ((beta)^2)'= (2g/l)(cosbeta - costheta) where thetha is the the maximum angle of the motion.
    In other words theta is the angle at which the derivative of beta=0. l is the length of the pendulum string.

    How do I use this equation to determine the path taken by the pendulum so I know what I am integrating the force of friction over?

    By the way, I am given information regarding the initial position of the ball above the floor, the length of the pendulum wire, and the ceiling height.
    Last edited: Feb 9, 2004
  2. jcsd
  3. Feb 9, 2004 #2
    Nevermind the help, I figured it out. It was an easy question. Sorry for wasting internet space.
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