A motorcycle drives by a stationary observer. The hum of the engine appears to have a frequency of 665 Hz as it approaches the observer. As it departs, the frequency appears to be 600 Hz. Take the speed of sound to be 342m/s.
(1) How fast is the motorcycle traveling?
The velocity of the observer is 0m/s, and the velocity of sound is given in the problem. The velocity of the source and the actual frequency of the sound are still unknown, but the problem also yields two equations:
