Answer:
The final velocity of the two blocks after the collision can be determined by the law of conservation of momentum. The initial momentum of the first block (3 kg * 2 m/s) is equal to the final momentum of the two blocks together (mass_total * velocity_final). The total mass of the two blocks is 3 kg + 3 kg = 6 kg.
So, velocity_final = (3 kg * 2 m/s) / (6 kg) = 2/2 = 1 m/s.