A ball rolling across a field with an acceleration of -0.5 m/s2 rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed?

A ball rolling across a field with an acceleration of -0.5 m/s2 rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed? 



A. 4 m/s
B. 16 m/s
C. 12.5 m/s
D. 6.25 m/s


Answer: A. 4 m/s


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