A 645 kg car is being pushed along a flat parking lot at a constant speed of 1.78 m/s. The coefficient of friction between the road and the car is 0.26. What force is being used to push the car?

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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!