21. Two balls of masses my = 1 kg and mo = 100 kg, with initial speed 1 m/s and10 m/s, respectively, collide inelastically in space. They stick together afterthe collision. Which of the following is true in the Center of Mass Frame?
(A) The total momentum does not change；
(B) The total kinetic energy doesnot change；
(C)The magnitude of velocity change of me is less than that ofmi；
(D) The magnitude of momentum change of me is less than that of my；
(E) The magnitude of kinetic energy change of me is less than that of my.