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?
question 13 options:
1) 8.0 m/s
2) 9.6 m/s
3) 12 m/s
4) 6.9 m/s
5) 0.20 m/s