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A student pulls a box of books on a smooth horizontal floor, ignore friction with a force of 131 N in a direction of 37° above the horizontal. If the mass of the box and the books is 33.7 kg, what is the acceleration of the box?

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  1. horizontal F = 131 cos 37 = m a = 33.7 a
    so
    a = (131/33.7)cos 37

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