Variation in 'g'

The gravity of a planet varies greatly and it is a quantity which depends mainly upon:

• Density
• Height from the surface
• Depth from the surface

Let us see how:-

Variation with Density:

Gravity ∝ Density

Variation with Height:

gₕ=(1-(2h/R))g

Variation with Depth:

gᵦ= (1-(d/R))g