Answer
(a) A runs the races at a constant speed from start to finish.
B starts slowly but continually accelerates during the race.
(b) $t = 9~s$
(c) $t = 9~s$
Work Step by Step
(a) A runs the races at a constant speed from start to finish.
B starts slowly but continually accelerates during the race.
(b) By using the values on the vertical axis, we can see that the greatest distance between the runners occurs at approximately $t = 9~s$
(c) The two runners have the same velocity when the slope of the displacement versus time graph is the same. This occurs at approximately $t = 9~s$
