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Rotational Motion of a pendulum bob

  1. Nov 18, 2008 #1
    A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 3.0 m/s. What is the initial height of the bob?

    I am not asking to do the problem for me, im just unsure how to approach this problem. Im just looking for what i need to solve for in order to find the height.
     
  2. jcsd
  3. Nov 18, 2008 #2

    LowlyPion

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    Homework Helper

    Consider the conservation of energy.

    PE = KE
     
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