# Variation in g with Depth

Acceleration due to gravity at the surface of the Earth

(1)

Acceleration due to gravity at depth d from the surface of the Earth,

(2)

From (1) and (2)

Fig. 4

Important Point
The value of g decreases on going below the surface of the Earth. From (2) we get g ∝ (R – d). So it is clear that if d increases, the value of g decreases.