APFIVE Relative Average Velocity of Two Cars
Two cars, A and B, start from rest at the same initial position. Car A accelerates at a rate of 2 m/s² for 10 seconds and then travels at a constant velocity. Car B accelerates at a rate of 4 m/s² for 5 seconds and then travels at a constant velocity. During the 15-second interval after the cars start, what is the average velocity of Car B relative to Car A?
A
3.4 m/s
B
0 m/s
C
-3.4 m/s
D
10 m/s
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