Part A The box is the important object in this problem. Choose a coordinate system that will simplify your work, and then draw a free-body diagram for the box. You should generally align the positive x axis with the direction in which your object of interest is moving, or the direction in which it would move if there were no friction.If the figure depicts the situation, which of the following describes the coordinate system that you should use? ANSWER: Positive x axis to the left, positive y axis downward Positive x axis to the right, positive y axis downward Positive x axis to the right, positive y axis upward Positive x axis to the left, positive y axis upward

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