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Thread: Would there be less gravity or different gravity if you were to travel to the center of the earth?

  1. #1 Would there be less gravity or different gravity if you were to travel to the center of the earth? 
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    I know this may sound like a kind of amateurish question, but its been bothering me for quite a while. I wouldn't think there is gravity at the earths center but I came here to post so I could get a proper answer from people who really know. Thanks


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    Administrator KALSTER's Avatar
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    Welcome Neon Wombat.

    According to Newton's Shell Theorem, gravity would get progressively less until it reaches zero at the gravitational centre. Basically, as you descend, a shell of equal depth to where you are gets cancelled out the whole time. Because of that, if you were inside a giant pingpong ball, you would be weightless at any point within it, no matter how thick the walls were.

    Hope that helps


    Last edited by KALSTER; March 29th, 2012 at 02:30 AM.
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    Quote Originally Posted by Neon wombat View Post
    I wouldn't think there is gravity at the earths center but I came here to post so I could get a proper answer from people who really know. Thanks
    Think about the difference between gravitational force and net gravitational force.
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    Moderator Moderator Markus Hanke's Avatar
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    Gravity is caused by mass ( in this scenario ).
    At the center of the earth, there is equal mass all around you in every direction ( roughly ).
    Therefore, you experience an equal gravitational force from all directions around you. Because of this, all these forces cancel out, and you experience a zero net force. At the earth's center you would feel no gravity, even though it is actually there.
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    Forum Sophomore Alex-The Great's Avatar
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    hmmmm.. ur right
    so the ans is - at the centre of the earth u experience zero gravitational force.........
    any more queries?
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  7. #6  
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    u experience zero gravitational force
    zero NET gravitational force.
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