The CNR trains are supposed to approach crossings at 62 km/hr and begin sounding their train whistles. The whistle produces a loud sound at a frequency of 220 Hz. The owners of the train suspect that the train engineers are exceeding the speed as they approach crossings. To test their assumptions the owners set up a receiver to measure the frequency of the approaching train whistle. As train #5 approaches, the observed frequency of the train whistle is 235 Hz at the stationary receiver. The local speed of sound is 340 m/s. Should the engineer be punished for speeding (how fast is the train going) or rewarded for obeying the rules and why?

The CNR trains are supposed to approach crossings at 62 km/hr and begin sounding their train whistles. The whistle produces a loud sound at a frequency of 220 Hz. The owners of the train suspect that the train engineers are exceeding the speed as they approach crossings. To test their assumptions the owners set up a receiver to measure the frequency of the approaching train whistle. As train #5 approaches, the observed frequency of the train whistle is 235 Hz at the stationary receiver. The local speed of sound is 340 m/s. Should the engineer be punished for speeding (how fast is the train going) or rewarded for obeying the rules and why?