2) Two boxes are connected by a cord running over a pulley as top of the table; the coefficient of kinetic friction between bo (a) Draw the free-body diagrams for the two boxes, identify (b) Calculate the tension in the cord. FIGURE 4-5

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!