Two stunt drivers drive directly toward each other. at time t = 0, the two cars are a distance d apart, car 1 is at rest, and car 2 is moving to the left with speed vo. car 1 begins to move at t = 0, speeding up with a constant acceleration ax. car 2 continues to move with a constant velocity. (a) at what time do the two cars collide? (b) find the speed of car 1 just before it collides with car 2.