A box of books weighing 320 N is shoved across the floor of an apartment by a force of 430 N exerted downward at an angle of 35.6° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.57, how long does it take to move the box 3.90 m, starting from rest?(adsbygoogle = window.adsbygoogle || []).push({});

I found n to be 260.19 but now i don't know where to go with it. What formula should I use? I can't find one that includes time.

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# Homework Help: Force at downward angle

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