(a) Derive an expression for the acceleration due to gravity at a depth below Earth’s…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
(a) Derive an expression for the acceleration due to gravity at a depth d below Earth’s surface, assuming Earth to be a sphere of uniform density and neglecting rotational effects.
(b) Using your result, calculate the depth below the surface at which the acceleration due to gravity becomes 60% of its surface value. Take Earth’s radius RE=6.4×106m.