PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics
Problem
Olympic sprinters run at about 10 ms−1 . Suppose an Olympic sprinter runs towards a large wall shouting, as he runs, at a frequency of 475 Hz. Which of the following is the best estimate of the frequency that the sprinter hears from the sound reflected from the wall?
(1) 475 Hz
(2) 489 Hz
(3) 505 Hz
(4) 512 Hz