Question

how to prove that gravity is zero at centre of earth with help of formula

Answer 1

This can be proved by the formula...
as 7th the formula we need to write the radius of earth...as u know that at the center of the earth the radius in zero therefore the value of n's we from the formula whole becomes zero and hence it gets proved that value of g at the center of the earth is zero...

hope this answer proves to be helpful to u buddy....
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Answer 2

Hey!

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When we move towards centre of earth, the mass is equally distributed in all directions.

The mass beneath you = Mass in front of you = Mass behind you

Thus, all the gravitational forces applied cancel each other and acceleration due to gravity (g) at centre of earth on centre of earth becomes zero (0).

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Hope it helps...!!!