Which of the following reference frames is NOT an inertial reference frame? * A. A man on a car speeding up on a freeway B. A woman on the street not moving C. A man on a train that is moving at constant velocity D. A woman in a car that is not accelerating

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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!