1. The problem statement, all variables and given/known data A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 minutes. How fast in m/s is the car moving after this time? 2. Relevant equations DeltaX=1/2(vi+vf)(DeltaT) Displacement=1/2(initial velocity + final velocity)(Time interval) 3. The attempt at a solution 3.2=1/2(6.4+x)(3.5) x=-4.6 ? Why is this negative? What is the final velocity?