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This coefficient μs is just a number, usually between 0 and 1, which you can look up in a table for all kinds of different materials. For rubber tires on asphalt, it’s 0.9; for tires on ice it falls to 0.15 (hence snow chains). And N, as we saw above, equals the gravitational force, which in turn depends on the object’s mass. The greater the mass, the more friction you get.
[사설]李 “집권했다고 맘대로 다 못한다”… 이 시점에 다짐한 까닭은。业内人士推荐wps作为进阶阅读
git: git: ignore more style changes from v9.1.1390
。谷歌是该领域的重要参考
Sum of squares(1..5) = 55
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