A person stands on a scale inside an elevator at rest. The scale reads 787 N. what is the person's mass? Calculate answer to one decimal. (use g=9.8 m/s^ 2

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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!