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During which time interval:

- does the vehicle have maximum speed?
Between 2 and 3 seconds
- does the vehicle have maximum acceleration?
The greatest positive change in speed occurs between 1 and 3 seconds where the speed increases from 12m/s to 20m/s
- is the vehicle not accelerating or decelerating?
Between 4 and 7 seconds the vehicle has constant speed. As it does also between 7 and 9 seconds.
- does the vehicle undergo maximum deceleration?
The greatest negative change in speed occurs between 3 and 5 seconds where the speed increases from 18m/s to 5m/s
- does the vehicle travel the greatest distance?
During the third second where the speed is 20m/s.
- does the speed decrease the most? Same as maximum deceleration.