A 1000-kg car traveling east at 20 m/s collides with a 1500-kg car traveling west at 10 m/s. The cars stick together after the collision. What is the common velocity of the cars after the collision?
A) 16 m/s, east
B) 6 m/s, west
C) 4 m/s, east
D) 2 m/s, east
E) 1 m/s, west
Correct Answer:
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