A simple pendulum of length l is suspended from collar C which is forced to move horizonta...

A simple pendulum of length l is suspended from collar C which is forced to move horizontally according to the relation xC = δm sin wft. Determine the range of values of wf for which the amplitude of the motion of the bob is less than δm. (assume that δm is small compared with the length l of the pendulum)

Fig. P19.111