You are standing on a scale in an elevator. While the elevator is at rest, the scale reads 650 N. The elevator begins to move with a downward velocity. If the elevator is increasing in speed (speeding up), what will happen to the weight reading displayed by the scale? The scale will measure a weight equal to 650 N The scale will measure a weight greater than 650 N The scale will measure a weight exactly equal to 0 N The scale will measure a weight less than 650 N

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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!