Question

A boy pulls a wooden box along a rough horizontal floor at constant speed by means of a force as shown. In the diagramf is the magnitude of the force of friction, Nis the magnitude of the normal force, and Fgis the magnitude of the force of gravity. Which of the following must be true?

A) P=f and N= Fg
B) P=f and N>Fg
C) P>f and N<Fg
D) P>f and N= Fg
E) none of these

Answer

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