SOLAR SYSTEM

Detailed explanation-1: -Orbital velocities are determined by the mass of the body being orbited and the distance from the center of that body, and not by the mass of a much smaller orbiting object. The period of the orbit is likewise independent of the orbiting object’s mass.

Detailed explanation-2: -As the orbital radius gets larger, the square root of the orbital radius also gets larger. So one over the square root of the orbital radius gets smaller because as the denominator of a fraction grows, the size of the fraction shrinks. So when orbital radius increases, we expect orbital speed to decrease.