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Scientists close in on 'superbrakes' for cars A theoretical study of friction between solids that looks at the process just one molecule at a time could soon lead to a more effective way to stop cars in an emergency than simply slamming on the brakes or using ABS. Scientists and engineers have assimilated an enormous amount of empirical information on the processes taking place when two surfaces rub against each other producing friction. They have even devised numerous physical rules and laws to explain these forces. These laws are adequate for most practical purposes, but according to Peter Reimann and colleagues, our understanding of how friction is traced back to the behaviour of solids at the molecular level where surfaces meet is still far from complete. He and his colleagues hope to improve our fundamental understanding of the microscopic laws governing materials in contact.
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