(13%) Problem 2: On a one lane road. a person driving a carat v1 = 54 1111/ h suddenly notices a truck a distance d = 12 [[1 in front of him. That truck is moving in the same direction at a constant velocity of 112 = 32 mi / h. In order to avoid a collision. the person in the car has to reduce their speed to o; in a time interval At. By slamming on their brakes, the driver can give the car a maximum negative acceleration of a1. Assume the acceleration is constant and that the direction of motion of the car is the positive direction. so the acceleration .11.