Question

Why acceleration due to gravity is zero at the center of earth
Acceleration due to gravity at depth is given as:

gd=g(1-d/Re)

at the center

Re =d

gd=g(1-Re/Re)

gd=g(1–1)

gd=g(0)

gd=0

Answer 1

Answer:

That is, the Earth tries to pull everything towards its center. So, when the body is at the center there is no need to pull it towards the center anymore. So, acceleration due to gravity is zero at the center of the Earth.

the acceleration due to gravity (g) is given by = GM/r2.

Formula: g = GM/r2

Values of g in SI: 9.806 ms-2

Dimensional Formula: M0L1T-2

Values of g in CGS: 980 cm s-2