The conveyor system is designed to move 20kg boxes of w=0.8m and h=0.35m. For v2 to be greater than v1, the inclined conveyor must accelerate the boxes at 0.0deltadeltadeltadelta m/s^2 from v1 to v2. Presuming the box is entirely on the inclined conveyor when the acceleration occurs, determine the minimum coefficient of friction that must be present between the box and inclined conveyor belt. Note that this value should be higher than the minimum necessary to prevent this box from sliding backwards, even if it were still or traveling at a constant velocity.