A 10,450 kg freight car is rolling along a track at 3.0 m/s. Calculate the time needed for a force of 1120 N to stop the car. A) 19 s B) 28 s C) 3.1 s D) 9.3 s

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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!