Question

explain why the value of g is zero at the centre of the earth

Answer 1

hey friend,
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 the distance is zero, hence gravity is zero.

Answer 2

Answer:

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Step-by-step explanation:

The acceleration due to gravity is given as

g =

GM

R2

At the centre of the Earth, the mass under

consideration is zero.

i.e. M = O

∴ g = 0

Hence, acceleration due to gravity, at the centre

of the earth, is zero.