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8th grade marble runs: January 2012

posted Feb 5, 2012, 8:26 PM by Taeko Onishi   [ updated Mar 18, 2013, 4:05 PM by Jesse Alexander ]
Teams of 8th graders all created marble runs to study the effects of gravity.  Their goal: to have the marble get to the bottom in the longest amount of time possible.  The winners' marble took 48 seconds to travel a vertical distance of 45 centimeters.