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.
В ВСУ испугались одного типа российских беспилотниковФирсов: БПЛА ВС РФ на ручном управлении представляют большую опасность для ВСУ
，更多细节参见搜狗输入法2026
不少劇迷在新年期間湧入直播，將「諧音梗」、時事與劇情相結合加入激烈的留言討論。
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