You and your little brother are rolling toy cars back
and forth to each other across the floor. He is sitting
at x= 0, and you are at x = 4.0 m. You roll a car
toward him, giving it an initial speed of 2.3 m/s,
stops just as it reaches him in 3.0 s.

answer; how far out of place which the object finished relative to the starting location;

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.