Acceleration Due To Gravity On Surface — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Acceleration due to Gravity on Surface Applies to spherical celestial bodies where mass is uniformly distributed or can be approximated as a point mass at the center. Specifically calculates gravity at the surface boundary defined by R. Newton's Law of Universal Gravitation: F g = G M m / R 2 Newton's Second Law: F = m g Equate the forces: m g = G M m / R 2 Cancel the test mass 'm' from both sides to isolate g Body must be spherically symmetric R > 0 Ignores rotational effects (centrifugal force) and local density variations g is constant everywhere (it decreases as R increases) The mass of the object on the surface affects the acceleration (it cancels out) There is no gravity in space (gravity exists but decreases with distance)