Newton's law of gravitation states that two bodies with masses m1 and m2 attract each other with a force gmim2 r2 where r is the distance between the bodies and g is the gravitational constant 6.67 x 10-" nm kg (a) if one of the bodies is fixed, find the work needed to move the other from r = a to r = b (b) compute the work required to launch a 2,500 kg satellite vertically into a geostationary orbit 35,000 km above the surface of the earth. assume that the earth's radius is 6.37 x 106 m and mass is 5.98 x 1024 kg, concentrated at its center