If you're seeking a solutions PDF for AP French's "Vibrations and Waves" textbook, here are some suggestions:

– Introduces Fourier analysis and vibrations of air columns. Chapter 7: Progressive Waves

While full solution PDFs are often restricted by copyright, many educational platforms provide verified walkthroughs and problem sets:

Solutions for these problems often involve fundamental equations of motion. For a simple pendulum with small angles, the restoring force and angular frequency are derived as: