Block A of mass 2.0 kg slides into block B of mass 2.0 kg. Before collision, block A moves to right with speed of 5.0 m/s, and block B is stationary. After collision, block A is moves to right with speed of 2.0 m/s and block B moves to right with speed of 3.0 m/s.
(a) What is the kinetic energy change for the system?
(b) Is the collision elastic or inelastic?