A 1000 kg car is moving with an initial velocity of 22 m/s in a time interval of 1.5 s before coming to a stop. What is the net force of the moving car? FAt = mv2 -mv1

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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!