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A railroad train is traveling at 30.0 m/s in still air.
Chapter 16, Problem 50E(choose chapter or problem)
A railroad train is traveling at 30.0 m/s in still air. The frequency of the note emitted by the train whistle is 262 Hz. What ? frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/s and (a) approaching the first and (b) receding from the first?
Questions & Answers
QUESTION:
A railroad train is traveling at 30.0 m/s in still air. The frequency of the note emitted by the train whistle is 262 Hz. What ? frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/s and (a) approaching the first and (b) receding from the first?
ANSWER:Solution 50 E Step 1 : In this question we need to find the frequency of the sound heard by the passenger in opposite direction with speed 18 m/s When he is approaching to first When he is receding from the first Data given frequency at source f = 262 Hz Velocity of passenger v =p18.0 m/s Velocity of sound in air is v a 343 m/s Velocity of source v = 30 m/s s Hence we have the velocity of the passenger with respect source v = v + v = 30 m/s + 18 m/s s p v = 48 m/s