Credit: Samsung
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
，这一点在51吃瓜中也有详细论述
One day, I will start my last project. I may or may not finish it. But after it's done, either due to tragedy, falling out of love with the craft, or simply not having time left to start another one, I will put my computer and notebooks down for the last time. That's life.
Фото: Павел Бедняков / РИА Новости，这一点在Line官方版本下载中也有详细论述
stroke_texture: “visible pencil grain”。关于这个话题，Line官方版本下载提供了深入分析
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