Posted by **Bridge** on Wednesday, September 28, 2011 at 9:08pm.

A box of books weighing 323 N is shoved across the floor by a force of 477 N exerted downward at an angle of 35° below the horizontal.

(a) If μk between the box and the floor is 0.51, how long does it take to move the box 4.80 m starting from rest?

(b) What is the maximum coefficient of kinetic friction between the box and the floor that allows the box to move from this applied force.

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