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

Summary

Subject keyword(s)	Forces and motion, Friction, Physical science, Physics, Science and technology, Speed, Technological design, Transportation technology
Grade level	Elementary School, Middle School, Informal Education
Intended audience	Learner
Resource type	Audio/Visual, Instructional Material
Resource format	image, image/gif, image/jpeg
Rights	Copyright 2004 Twin Cities Public Television, Inc.

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