Question

Explain why the value of g is zero at the centre of the earth​

Answer 1

Explanation:

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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Answer 2

Answer:

At the centre of Earth, the force due to upper half of the Earth will cancel the force due to lower half. In the similar manner, 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. Since, from Newton's law, we know F=mg. Since, mass m of an object can never be 0. Therefore, when F=0, then g has to be 0. Thus, the value of g is zero at the centre of Earth.

Explanation:

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