When you stand at rest on a weighting scale, the force due to gravity on you is A. Equal in magnitude to the support force of the scale B. Almost equal to the support force of the scale C. Actually absent D. None of the above

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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!