A 70-kg man stands on a bathroom scale inside an elevator. The scale measures in units of Newton's  A.) The elevator accelerates upward from rest at a rate of 1.25m/s2 for 1.5 s. What does the scale read during this 1.5 intervals? B.) The elevator continues upward at a constant velocity for 8.50s. What does the scale read now? C.) While still moving upward, the elevator's speed decreases at a rate of 0.550 m/s2 for 3.00s . What is the scale reading during this time?

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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!