A man is traveling on a bicycle at 11 m/s along a straight road that runs parall

Question

A man is traveling on a bicycle at 11 m/s along a straight road that runs parallel to some railroad tracks. He hears the whistle of a train that is behind him. The frequency emitted by the train is 880 Hz, but the frequency the man hears is 793 Hz. Take the velocity of sound to be 340 m/s

a) What frequency is heard by a stationary observer located between the train and the bicycle? (811 Hz???)

b) What is the speed of the train, and is the train traveling away from or toward the bicycle? (778 Hz???)

Explanation / Answer

Speed of bicycle v = 11 m / s

Speed of sound V = 340 m / s

Actual frequency f = 880Hz

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