Question

(1) With a neat labelled diagram, how the value of g changes
while going deep inside the earth.
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Answer 1

here is the answer!!!!

There are 3 factors:

• Nearer to earth center, there is less mass that contributes to the force of gravity (as newton showed the outer shell of mass contributes net force of zero).

• The distance to the center of gravity of earth reduces.

• Deeper down, the density (mass per volume) will increase.

Answer 2

Explanation:

The value of g changes while going deep inside the earth . It goes on decreasing as we go from the earth's surface towards the earth's centre.

We shall treat the earth as a sphere of uniform density . If we consider a particle of mass m at point p at a distance ( R-d ) from the earth's centre , where R is the radius of the earth and d is the depth below the earth's surface , the gravitational force on the particle due to the earth is