Now, see that less-than-or-equal sign? This says μsN is the maximum static friction force in a given situation. If you push the book with a force of 1 newton, the frictional force will be 1 newton. Double the pushing force and the frictional force also doubles. It does whatever it has to in order to keep the two surfaces stationary—up to a point. If you keep pushing harder, your applied force will eventually exceed μsN and the book will start to slide. At that point, kinetic friction kicks in.
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Top US regulators met with Bill Anderson, Bayer’s CEO, last year to discuss “litigation” issues – including “supreme court action” over its glyphosate weed killer – just months before the Trump administration took a series of steps to boost Bayer’s case at the high court, internal government records show.，详情可参考谷歌
與此同時，蘇格蘭警察發言人表示，警方代表倫敦反恐警察部門牽頭的一項調查，在東基爾布萊德的一處住所進行搜查。