Athletes wearing friction-reducing swimsuits triumphed at the 2008 Beijing Olympics Adam Pretty/Getty Images
Friction: Biography
Jennifer R. Vail, Harvard University Press
In 2009, the World Swimming governing body prohibited specific swimsuits from international competitions, citing unfair advantages. High-tech equipment from NASA was instrumental in designing these swimsuits, which featured ultrasonically welded seams instead of traditional stitching.
Swimmers donning these suits shattered 23 of the 25 world records during the 2008 Beijing Olympics. What made this swimwear so revolutionary? The answer lies in its remarkable ability to minimize friction between the swimmer and the water, enhancing speed and performance.
This instance illustrates the critical influence of friction in our world, a theme thoroughly investigated by Jennifer R. Vail in her book, Friction: Biography.
Bale is a tribologist, focusing on friction, wear, and lubrication as materials interact. She emphasizes, “The forces that resist movement drive us forward.” This concept forms the foundation of her work, which, while technical, delves into friction’s impact on science, technology, and civilization—a necessity as we confront future technological hurdles.
“We study friction because it is omnipresent,” Vail remarks. How did ancient Egyptians transport heavy materials for monumental projects? How do anoles and geckos scale vertical surfaces? Why was Teflon included in the Manhattan Project? What aerodynamic principles govern airplane wings? These queries all converge on friction.
From desert sands controlled by hair-like structures on animal legs to synthetic substances optimizing fluid interactions, friction plays a pivotal role, shaping everything from quantum activities to cosmic phenomena. Bale provides a detailed, passionate narrative on friction’s ubiquitous presence, showcasing its significance.
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Friction has been central to civilization ever since humans began rubbing objects together to create fire.
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While discussing friction, Bale emphasizes the potential risks associated with harnessing this force. Our ability to manipulate friction has been integral to civilization, from the earliest fire-starting methods to modern innovations in engines, turbines, and contact lenses.
However, it is Bale’s outlook on the future that captivates readers. Alarmingly, friction consumes approximately 40% of energy in manufacturing processes, impacting both production and friction mitigation efforts. A study highlighted that an average car’s fuel consumption was over a third burnt solely to counteract friction. In a world increasingly challenged by energy conservation, optimizing friction is vital for sustainable practices.
Vail noted that innovations in tribology could potentially save energy equivalent to 34 million barrels of gasoline annually—180 times the daily gasoline consumption in the U.S. Bale’s urgent call for more tribologists in energy certification and greater emphasis on this field in educational curriculums is vital for our energy future.
This book is essential reading. Yet, despite Bale’s engaging tone and clear enthusiasm, the complexity may overwhelm some casual readers. Nevertheless, the effort is rewarding; gaining insight into friction enriches our understanding of the world, highlighting how countless interactions shape our experiences.
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Source: www.newscientist.com
