1. The problem statement At the instant when the traffic light turns green, a car starts with a constant acceleration of 1.8 m/s^2 [forward]. At the same instant a truck traveling with a constant velocity of 8.5 m/s [forward] overtakes and passes the car. How far from the starting point will the car catch up to the truck? 2. The attempt at a solution Car: d = V1*t + 1/2*a*t^2 d= 0 + 1/2(1.8)(t)^2 d= 0.9t^2 Truck: d = V * t d = 25t Put it all together 0.9t^2 = 25t 0.9t^2 - 25t = 0 Now what?