Please explain in basic simple ways

Q 03 (10 pts) A block #1 of mass m1 = 5.22 kg moving with speed v1 = 21.7 m/s collides with another block #2 of mass m2 = 75.2 kg at rest on a level, fricitonless surface. See the figure below.7q zesteamme rillw If block #2 moves to the right with speed of 2.13 m/s immediately after the collision, what is the velocity of block #1 immediately after the collision? 6000 m