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A Boy Pulls a Wooden Box Along a Rough Horizontal

question 25

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A boy pulls a wooden box along a rough horizontal floor at constant speed by means of a force as shown.In the diagram f is the magnitude of the force of friction, N is the magnitude of the normal force, and Fg is the magnitude of the force of gravity.Which of the following must be true? A boy pulls a wooden box along a rough horizontal floor at constant speed by means of a force as shown.In the diagram f is the magnitude of the force of friction, N is the magnitude of the normal force, and F<sub>g</sub><sub> </sub>is the magnitude of the force of gravity.Which of the following must be true? A) P = f and N = F<sub>g</sub> B) P = f and N > F<sub>g</sub> C) P > f and N < F<sub>g</sub><sub> </sub> D) P > f and N = F<sub>g</sub><sub> </sub> E) none of these

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