Question

An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 443 Hz when the train is approaching him and 440 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? m/s (Assume the speed of sound is 345 m/s.)

Name: an alert physics student stands beside the tracks as a train rolls slowly past he notes that the frequency of the train whistle is 443 hz when the train is approaching him and 440 hz when th 63627
Uploaded: 2022-02-16T12:11:18-08:00
Duration: 3 min 18 s
Channel: Maitreya T
Description: an alert physics student stands beside the tracks as a train rolls slowly past he notes that the frequency of the train whistle is 443 hz when the train is approaching him and 440 hz when th 63627

          An alert physics student stands beside the tracks as a train
rolls slowly past. He notes that the frequency of the train whistle
is 443 Hz when the train is approaching him and 440 Hz when the
train is receding from him. Using these frequencies, he calculates
the speed of the train. What value does he find? m/s (Assume the
speed of sound is 345 m/s.)

Added by Angela S.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Maitreya T

02/16/2022

Step 1

Step 1: Use the formula for the Doppler effect when the train is approaching the student: \[ \frac{f_1}{f_0} = \frac{1}{1 - \frac{U}{V}} \] where: \( f_1 = 443 \) Hz (frequency when approaching), \( f_0 = 440 \) Hz (original frequency), \( U \) = speed of the Show more…

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An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 443 Hz when the train is approaching him and 440 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? m/s (Assume the speed of sound is 345 m/s.)