Let's go back to that tug-of-war. The driver on the right now has an idea: Instead of gunning his engine, he throttles down to maintain a static friction interaction with the rails. Slow and steady. The guy on the left floors it—and what happens? His wheels spin and he gets a kinetic frictional force. Well, static friction beats kinetic friction, so the right train wins!
Police in Norway have cordoned off the area around the US embassy in Oslo after an explosion was reported there.，详情可参考新收录的资料
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Кадр: Telegram-канал «Следком»
«После ударов по военному центру в районе Кокаль и еще одному ядерному центру Пакистана сотни погибших и раненых были доставлены в больницу в Исламабаде», — говорится в сообщении.，更多细节参见新收录的资料