A railroad train travels forward along a straight track at 90 m/s for 1,000 m and then travels at 60 m/s for the next 1,000 m.What is the average velocity?
A) 72.5 m/s
B) 72.0 m/s
C) 77.0 m/s
D) 69.0 m/s
E) 74.7 m/s
Correct Answer:
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