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摩擦力是一种可以让运动的物体起到减速的作用力,在行进中的汽车刹车器可以挽救乘客的生命。尽管摩擦力如此重要,但人们却从不知道如何从原子或分子层面解释这种现象的作用机制。不过,德国于利希研究中心的科学家Bo Persson,却在长达20多年的时间里一直研究着这种他看来奇妙无比,但却常常被大家忽略的摩擦力现象。最近,Persson和他的同事们揭示了橡胶轮胎在沥青路面上滑行时,所产生的摩擦力依赖于速度和温度
Friction is a type of force that slows the movement of an object, and the braking of a moving vehicle can save passengers’ lives. Although friction is so important, people never know how to explain the mechanism of action at the atomic or molecular level. However, Bo Persson, a scientist at the Yuelich Research Center in Germany, has been studying this phenomenon of friction he seems to be marvelous but often overlooked for more than 20 years. Recently, Persson and his colleagues revealed that when a rubber tire slides on an asphalt pavement, the friction generated depends on speed and temperature