PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A newly discovered planet X has mass 5.0×1024kg and radius 4.0×106m.
(a) Calculate the acceleration due to gravity on the surface of planet X.
(b) Determine the height above the surface at which the acceleration due to gravity on planet X will fall to one-half of the surface value.
(c) Find the depth below the surface at which the acceleration due to gravity will become one-half of the surface value.
(d) Which of the two distances obtained in (b) and (c) is smaller? Give a brief physical reason for the difference.