1. The problem statement, all variables and given/known data A truck travels at a constant speed of 28.0 m/s in the fast lane of a two-lane highway. It approaches a stationary car stopped a the side of the road. When the truck is still 125 m behind the car, the car pulls out into the slow lane with an acceleration of 2.6 m/s2. How long will it take the truck to reach the car? (Answer is 6.32 s) 2. Relevant equations dt = dc + 125 dc = 1.3t2 3. The attempt at a solution Okay I got the answer, but it's in quadratic form so: 1.3t2 - 28.0t + 125 = t = 15.2 s or t = 6.32 s How do you know which answer is the correct one?