Chapter 15, Problem 25MCQ

You stand at x = 0 m, listening to a sound that is emitted at frequency f_s. Figure Q15.25Q shows the frequency you hear during a four-second interval. Which of the following describes the motion of the sound source?

Figure Q15.25

A. It moves from left to right and passes you at t = 2 s.

B. It moves from right to left and passes you at t = 2 s.

C. It moves toward you but doesn’t reach you. It then reverses direction at t = 2 s.

D. It moves away from you until t = 2 s. It then reverses direction and moves toward you but doesn’t reach you.