An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?
A. 8.0 m/s
B. 9.6 m/s
C. 12 m/s
D. 6.9 m/s
E. 0.20 m/s
Answer: C
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