Consider a string that has one end fixed, with the other end free to move in the vertical direction. Suppose the string is put into motion by virtue of the free end's being manually moved up and down.
A) The frequency of the motion is equal to the frequency of the motion of the free end.
B) The frequency of the motion is half the frequency of the motion of the free end.
C) The frequency of the motion is equal to the frequency of the fundamental mode of vibration of the string.
D) The frequency of the motion is equal to the frequency of the second harmonic of vibration of the string.
