Is it possible for a human to ride a bicycle at the speed of 80 miles per hour? This riddle asks students how such a feat could be accomplished. On a clue page, students read about and view a brief video clip of two boys experimenting to see if a certain combination of gears can help them bike faster. When students select the correct answer from the riddle's three answer choices, a video clip plays about a unique kind of aerodynamic bicycle. A cyclist talks about the special design features--the bike is covered and the rider sits in a reclining position--that reduce wind resistance and enable cyclists to reach speeds greater than 80 miles per hour. Copyright 2005 Eisenhower National Clearinghouse


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    Technological design,Informal Education,Middle School,NSDL,Upper Elementary,Grade 5,Physics,oai:nsdl.org:2200/20120114184807203T,Grade 7,Engineering,Friction,Transportation technology,Forces and motion,Science and technology,NSDL_SetSpec_1007936,Elementary School,Physical science,Chemistry,Speed,Grade 6,Technology



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