In order to be able to answer this question effectively and efficiently we have to consider the Newton's law of Universal gravitation which is given by the mathematical representation below;
Gravitational force, F = G (m1 × m2) / r^2.
Where G = Gravitational constant, m1 and m2 and the masses of body one and two respectively and r = distance.
So, we can deduce that the mass(in form of kinetic energy) increase at large distance and this makes the speed to reduce.
