Question

A Train is traveling 23 m/s while honking their horn of at a frequency of 200 Hz.     a) What is the observed frequency of an observer sitting on the train?   b) What is the observed frequency of a stationary observer behind the train?   c) What is the observed frequency of a stationary observer in front of the train?     d) What is the observed frequency of an observer behind the train and trying to catch the train but only running 3 m/s

Answer 1

We know that the Doppler effect of sound is ytv v干v, a) Here the frequency remains same |f - 200 Hz b) We have 345 345+23 - 200x f-187.5 Hz c) We have 345 345-23 - 200x f 214.3 Hz d) We have 345+3 345+23 = 200× f 189.1 Hz