Car a (Mass = 1000 Kg) Moves to the Right

Multiple Choice

Car A (mass = 1000 kg) moves to the right along a level, straight road at a speed of 6.0 m/s. It collides directly with car B (mass = 200 kg) in a completely inelastic collision. What is the speed of the car immediately after the collision?

A) 5.0 m/s
B) 6.0 m/s
C) 4.0 m/s
D) 3.0 m/s
E) zero