1) The picture shows a van and a car traveling in the same direction. The 500 kg van going right at 5.0 m/s bumps into a 400 kg car moving in
the same direction at 2.0 m/s. The car has a final speed of 4.0 m/s.
What is the final velocity of the van? Assume there are no net external
forces and thus, momentum is conserved during the collision.

A)
2.5 m/s
B)
3.0 m/s
C)
3.4 m/s
D)
4.3 m/s