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Thread: Earth's spin and mass distribution

  1. #1 Earth's spin and mass distribution 
    Forum Freshman
    Join Date
    Nov 2008
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    Hello there!


    Why unequal mass distribution on and in our planet doesn't
    tilt and shake the Earth in human time-scale period but ONLY in geological periods,
    whereas even slight mass umbalance on car tires affects the latters immediately ?


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  3. #2  
    Reptile Dysfunction drowsy turtle's Avatar
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    1) Car tires spin a lot faster

    2) Car tires have a significantly smaller radius, so smaller changes are much more significant.

    3) The Earth is essentially a closed system, rotating in a vacuum, whereas a car tire is in contact with the road surface.


    "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." ~ Douglas Adams
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  4. #3  
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    Jun 2011
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    Normally you don't mass distribution which is actually happening in our daily life but you feel this mass distribution when earth jolt in earthquake.
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