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牛頓運動定律的問題
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力學
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andorothy
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Sep 13, 2012, 12:16:31 PM
9/13/12
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to feynm...@googlegroups.com
(不好意思,我是重考生,所以我用的是95課綱的講義)
CH4 P.22 範例26
第1題 老師有算出動滑輪的加速度=12.5
我想問的是
滑輪部分 F=2T 那不是合力=0了 為什麼滑輪還會有加速度???
麻煩幫我解惑一下~謝謝~
討論區板主
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Sep 14, 2012, 4:11:58 AM
9/14/12
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您好:
合力=0沒錯
但因為滑輪質量=0
即使加速度a=0
F=ma ->0=0xa
還是符合牛頓第二運動定律
andorothy於 2012年9月14日星期五UTC+8上午12時16分31秒寫道:
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