A 12.0-kg box rests on the flat floor of a truck. The coefficient of friction between the box and the floor are μs= 0.19 and μk= 0.15. The truck stops at a stop sign and then starts to move with an acceleration of 2.20m/s2. If the box is 1.80m from the rear of the truck when the truck starts, how much time elapses before the box falls off the truck? How far does the truck travel in this time?