why the value of g is zero at the centre of the earth
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because acceleration is velocity/time and velocity is displacement / time.In centre of earth displacemnet is zero sor velocity and acceleration is zero
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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.
At the centre of Earth, force due to any portion of the Earth at the centre will be cancelled due to the portion opposite to it. Thus, the gravitational force at the centre on any body will be 0.
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