A research satellite of mass 200 kg circle the earth in an orbit of average radius 3R/2, where R is the radius of the earth. Assuming the gravitational pull on the mass of 1 kg on the earth's surface to be 10 N, the pull on the satellite will be
(a) 1212 N
(b) 889 N
(c) 1280 N
(d) 960 N
