18. Multiple Correct: A satellite of mass M moves in a circular orbit of radius R at a constant speed v around the Earth which has mass ME. Which of the following statements must be true? Select two answers:
(A) The net force on the satellite is equal to Mv2/2 and is directed toward the center of the orbit.
(B) The net work done on the satellite by gravity in one revolution is zero.
(C) The angular momentum of the satellite is a constant.
(D) The net force on the satellite is equal to GMME/R
