Question
Tue September 18, 2012 By:

HOW is the value of 'g' zero at the centre of the earth

Expert Reply
Tue September 18, 2012
the whole concept of accleration due to gravity is due to the gravitational pull of a body over another body. the gravitational pull between the bodies is only for the mass between the center to center between the bodies.
Since at the center of earth the mass between the two bodies is zero, and so is the g
you can also take it with the view point of symmetry as the body will be pulled apart by earth fro all sides and thus the body is in full equilibrium and also there is no force on the body at the moment.
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