A box of mass 15 kg is sitting on a horizontal floor, where the coefficients of static and kinetic friction between the box and the floor are 0.60 and 0.55, respectively. If a horizontal force of magnitude 50 N is applied to the box, then the magnitude of the force of friction acting on the box is equal to: A. 30 N B. 50 N C. 81 N D. 88 N E. 150 N F. None of those

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