You are riding in an elevator on the way to 18th floor of your dormitory. The elevator is accelerating upward with "a=1.90m/s^2". Beside you is the box containing your new computer; the box and its contents have a total mass of 28.0kg. While the elevator is accelerating upward, you push horizontally on the box to slide it in a constant speed toward elevator's door. If the coefficient of the kinetic friction between the box and the elevator is 0.32. What magnitude of force must you apply?

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