A 60-cm-long bar, clamped at its middle, is vibrated lengthwise by an alternating force at its end.

Question:

A 60-cm-long bar, clamped at its middle, is vibrated lengthwise by an alternating force at its end. (See Fig. 22-3.) Its fundamental resonance frequency is found to be 3.0 kHz. What is the speed of longitudinal waves in the bar? A Clamp L N Fig. 22-3