Question

The formula for acceleration due to gravity at depth d is:

Options

• gd = g × d / R

• gd = g[1 − d/R]

• gd = g × R / d

• gd = g / (1 − d/R)

Answer 1

gd = g[1 − d/R]

Explanation:

This is the standard formula derived from the shell theorem, where gd decreases linearly with depth d below Earth's surface.