<P> In Newtonian physics, free fall is any motion of a body where gravity is the only force acting upon it . In the context of general relativity, where gravitation is reduced to a space - time curvature, a body in free fall has no force acting on it . </P> <P> An object in the technical sense of the term "free fall" may not necessarily be falling down in the usual sense of the term . An object moving upwards would not normally be considered to be falling, but if it is subject to the force of gravity only, it is said to be in free fall . The moon is thus in free fall . </P>

Which force acts on an object in free fall