2. (8 points) Block A has mass 1.00 kg and block B has mass 3.00 kg. The blocks collide and stick together on a level, friction less surface. After the

collision, the kinetic energy (KE) of block A is A) one-ninth the KE of block B. B) one-third the KE of block B. C) three times the KE of block B. D) nine times the KE of block B. E) the same as the KE of block B.