17. Assertion (A): Value of acceleration due to gravity is minimum on the surface of Earth. Reason (R): The value of acceleration due to gravity decreases with both altitude and depth.
(B) Both A and R are true but R is not correct explanation of A
Acceleration decreases according to formula g′=g(1−R2h), where h is either height or depth and R is radius of earth. So, Acceleration due to gravity decreases as height or depth increases.