We can write this requirement for SHM in another way. Remember Newton's Second Law:
If we replace the F in Hooke's Law with ma, we get
or, if we write the derivative all by itself,
Q: The vocal cords of an opera singer vibrate back and forth with a period of 0.8 milliseconds. What is the frequency of their oscillation? What is the angular frequency of their oscillation?
Q: How much will he makes if he sells his stock at its peak?