Task: Text Categorization
Input (English): On the moon, mascons are areas where this type of anomaly is present. In geophysics, its strength is related to an object's moment of inertia by MacCullagh's formula. Faye's formula gives the difference in values of this phenomenon that is induced by free-air anomalies. Models with anomalies in the strength of this phenomenon can be calculated in a formula given by Bouguer. The equipotential surface of this force which gives the (*) mean sea level is known as the geoid. The distance at which tidal forces will overcome this other force is known as the Roche limit. Isostatic equilibria are made between a balance between the lithosphere's buoyancy and this other force. For 10 points, name this force, which causes a downward acceleration of most objects equal to 9.8 meters per second squared.
Output (English): Science