estion 1 A car travels between two stations, A and B, 4 km from each other. It starts from rest at A and accelerates uniformly until it obtains a speed of 80 km/h. This car maintains until it is uniformly decelerated, coming to a stop at B. The time taken for the whole journey is 5 minutes, and the magnitude of the acceleration is half that of the deceleration. Calculate the acceleration and the distance the car travels at constant speed. ​