question_answer 2)

(a)Acceleration due to gravity increases/decreases with increasing altitude. (b)Acceleration due to gravity increases/decreases with increasing depth (assume the earth to be a sphere of uniform density). (c) Acceleration due to gravity is independent of mass of the earth/mass of the body. (d) The formula is more/less accurate than the formula mg  for the difference of potential energy between two points  and  distance away from the centre of earth.  

Answer:

(a) decreases (b) decreases (c) mass of the body (d) more.