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Somebody help with this circular motion question

  1. Oct 30, 2011 #1
    A simple pendulum is oscillating with angular displacement of 90 degrees . For what angle with the vertical the acceleration of bob is directed horizontally ?
    Thanks
     
  2. jcsd
  3. Oct 30, 2011 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What have you done so far?

    Hint: Consider the radial and tangential components of the acceleration.
     
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