# How the frequency of the oscillation is affected?

Is the frequency of oscillation of a rotating disk affected if a mass hanging from (attached to the disk but pulled by gravity) the disk exerts a torque on the rotating disk?

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If you like this question you may also enjoy reading this post. –  Qmechanic Feb 18 '13 at 1:32

To simplify things I assume that 1.The disk doesn't rotate, but just oscillates. 2.The disk is flat out and infinitely thin (it's a circular disk with radius $r$) 3.There are two cases: when the disk is a. horizontal (all parts of the disk are same height from ground). b. vertical (perpendicular to the horizontal alignment.