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作者 kaet 在 PTT [ Physics ] 看板的留言(推文), 共7則
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[轉錄][閒聊] 牛頓的八卦
[ Physics ]36 留言, 推噓總分: +14
作者: Savate - 發表於 2010/01/05 17:35(16年前)
32Fkaet:不過牛頓仍然是我心目中有史以來對人類貢獻最大的一個人01/08 13:58
[題目] 簡單電學
[ Physics ]6 留言, 推噓總分: +4
作者: fantasywing - 發表於 2009/06/10 23:56(16年前)
5Fkaet:推簽名檔 XDD06/11 08:39
Re: [題目]小船過岸最短距離
[ Physics ]8 留言, 推噓總分: +2
作者: mantour - 發表於 2009/03/27 12:35(17年前)
4Fkaet:最短的距離當然是30公分 此時船對地的速度垂直於岸邊03/30 21:49
5Fkaet:但這是做不到的 因為水的速度大於船的速度03/30 21:49
6Fkaet:我很喜歡這一題 這一題用幾何去想的話很直觀也很簡單 但是03/30 22:19
7Fkaet:用代數做的話相當麻煩(你可以設船速Vx Vy 在Vx^2+Vy^2=25^203/30 22:23
8Fkaet:的條件下 讓Vy/(40-Vx)最大 求出Vx Vy 再求出距離03/30 22:24
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