1. Initially, as a box of mass 1.0kg moves with velocoty 2.0m/s to the right, a force of magnitude 20. N starts pulling it to the right. The box slides on a rough floor with uK= 0.25. (a) What is the acceleration of the box? (b) What is its velocity after traveling 3.0 m?

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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!