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Homework Help: Pendulum Problem Part 2

  1. Oct 19, 2011 #1
    A pendulum (with string length "L") and aball of mass "m" is pulled back to a horizontal position and then released. Assuming that θ is the angle between the string and the vertical, find (a.) the magnitude of the radial acceleration of this ball at an angle of θ as a function of m,g, L, and/or θ.

    I think I found what "V" is but im not completely sure.
  2. jcsd
  3. Oct 19, 2011 #2


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    You know from the equation for centripetal acceleration that a is going to depend on v and the radius, which is L in this case. However, v is not constant, but rather is a function of theta. You need to find this function.
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