You are riding in an elevator on the way to the eighteenth floor of your dormitory. The elevator's upward acceleration is 1.91 m/s2. Beside you is the box containing your new computer; box and contents have a total mass of 29.0 kg. While the elevator is accelerating upward, you push horizontally on the box to slide it at constant speed toward the elevator door. Part A If the coefficient of kinetic friction between the box and elevator floor is 0.35, what magnitude of force must you apply