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    3. earth is a sphere then what will be the gravitational force at the cetre of the earth ?
    earth is a sphere then what will be the gravitational force at the cetre of the earth ?

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    +1  Views: 636 Answers: 3 Posted: 14 years ago
    zenius

    In case of earth, the impact of force of gravity is zero at the center of the earth. If you want to know why is it zero, then you must see the free wikipedia on gravity.
    Commented 14 years ago
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      3 Answers

      http://en.wikipedia.org/wiki/Gravity_of_Earth

      14 years ago. Rating: 0
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        In case of earth, the impact of force of gravity is zero at the center of the earth.


        See this relation below,


        i.e Effective Gravity ( g') = g ( 1 - d / R)


        where, d = depth of the earth


        & R = mean radius of the earth


        So, for the center of the earth, d = R,


        Hence, the net or effective gravity at the center of the earth is zero 


         i.e. g' = g ( 1-R/R) = g ( 1-1) = g × 0 = 0


        Hope this has helped you to some extent the above phenomenon. Share the idea with your friend too.


         

        14 years ago. Rating: 0
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          Aint not it is neutral.

          14 years ago. Rating: 0
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