1. The problem statement, all variables and given/known data A truck on a straight road starts from rest, accelerating at 2.0 m/s^2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20.0s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.0s. What is the average velocity of the truck for the motion described? 2. Relevant equations Average velocity = (Velocity 1 + velocity 2 + velocity 3) / 3? [s(t2) - s(t1)] / (t2- t1) 3. The attempt at a solution I tried using the first equation stated above, but received an incorrect answer. I know that for specifically average velocity, I have previously used s(t2) - s(t1) / t2- t1, with the t's representing a specific time. However, I cannot seem to apply that equation to this question.