Explain why value of g is zero at the centre of the earth.
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At the centre of Earth, the force due to upper half of the Earth will cancel the force due to lower half. ... Therefore, when F=0, then g has to be 0. Thus, the value of g is zero at the centre of Earth
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Acceleration due to the earth's gravity is zero at the centre of the Earth because at that point the mass of the earth is equally distributed in all directions, so pulling equally in all directions for a net zero pull. As the distance from the centre decreases, the acceleration due to gravity also decreases.
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