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Problem: A box of books weighing 280 N is shoved across the floor of an apartment by a force of 390 N exerted downward at an angle of 35.3Â° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57,

Part A: How long does it take to move the box 4.00 m, starting from rest?

_________ s

I don't just need an answer, work and explanations/walkthrough would be much appreciated! Thanks.

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