A force of magnitude P is exerted on a box of mass m, as shown in the figure. The force is directed at an angle ̸ below the horizontal, and the box remains a rest. The box rests on a horizontal surface, with which the box has a nonzero coefficient of friction. The normal force on the box due to the floor is equal to
mg + P
mg + P sin ̸
mg
mg + P cos ̸
mg + P tan ̸