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Thread: What I Observed.

  1. #1 What I Observed. 
    Your Mama! GiantEvil's Avatar
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    Apr 2010
    Vancouver, Wa
    I just observed a long train passing by, and it seemed that more
    noise and rumble occured at the ends relative to the center.
    Itís just one crappy observation, does it have any physics to back it up?

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  3. #2  
    Brassica oleracea Strange's Avatar
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    Oct 2011
    It could be that the middle carriages rattle less because they are attached at both ends (which damps the vibration) while the end ones are free to shake about more.

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  4. #3  
    Forum Professor Zwolver's Avatar
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    May 2006
    I believe also because the force is applied to move to the front, the friction and thus the sound produced by this friction goes backwards. Basically the wheels make more sounds listening from the back, than from the front, because of this. But i didn't know this was an observable difference. As the doppler effect would actually increase both the volume and frequency of the sound on the front of the train.
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

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