Ask Question
25 December, 21:34

The frequency of a steam train whistle as it approaches you is 552 Hz. After it passes you, its frequency is measured as 486 Hz. How fast was the train moving (assume constant velocity) ?

+1
Answers (1)
  1. 26 December, 01:29
    0
    Approaching frequency = 552 Hz

    Passing frequency = 486 Hz

    The actual whistle frequency is (552 + 486) / 2 Hz = 519 Hz

    Assume the speed of sound = 340 m/s

    Using the Doppler formula: (519/486) - 1 = 0.0679

    The train speed = 0.0679 * 340 m/s = 23.09 m/s
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “The frequency of a steam train whistle as it approaches you is 552 Hz. After it passes you, its frequency is measured as 486 Hz. How fast ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers