Question 273925
weight is the force of gravitational attraction, with r measured from the center of the Earth


the force is directly proportional to the product of the masses
___ and inversely proportional to the square of the distance between the centers of mass


f = G * M1 * M2 / r^2 (G is the gravitational constant)


your C value incorporates the gravitational constant along with the masses of the Earth and the object


so ___ r = sqrt(C / w)