You pull on a large box using a rope as in Fig. 5.21a, except the rope is at an angle of 15.0° below the horizontal. The weight of the box is 325 N, and the coefficient of kinetic friction between the box and the floor is 0.250. (a) What must be the tension in the rope to make the box move at a constant velocity? (b) What is the normal force that the floor exerts on the box?

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