Question

at what depth below the surface of earth is the value of g same as that at a height of 5 km​

Answer 1

Answer:

Explanation:

At height h above the surface of earth ( for h<< R) g' = g(1–2h/R)

And at depth d below the surface of earth, g'= g(1-d/R)

As per question, g (1–2h/R) = g(1-d/R)

=> 2h = d => d = 2×5= 10 km