The U.S. quarter has a mass of 5.67 g and a thickness of 1.50 mm. How may pounds would a stack of quarters weigh if you stacked them as high as the Eiffel Tower? The Eiffel tower has a height of 986 feet. Remember: 1 pound = 454 g 1 cm = 10 mm 1 inch = 2.54 cm 1 foot = 12 inches

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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!