1. The problem statement, all variables and given/known data A drag racer, starting from rest, speeds up for 402 m with an acceleration of +23.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.70 m/s2. How fast is the racer moving 3.35 102 m after the parachute opens? 2. Relevant equations ? 3. The attempt at a solution ? I have no clue where to begin this problem. Please help!