Q
For h much smaller than Earth's radius R, how does the ratio of gravity at depth h to gravity at altitude h vary with h?
RRB Group-D
02/11/2018 / Shift I
2018
✓ Answer:
D
It increases linearly
In the uniform-density approximation, g_depth ≈ g(1 - h/R) and g_height ≈ g(1 - 2h/R). Their ratio is approximately 1 + h/R.