![](https://i.imgur.com/8wTOlRs.jpg)
[考試] 形心、質心、慣性矩問題
![](https://i.imgur.com/8wTOlRs.jpg)
問題一:如上圖示,為何x'值跟我想的不一樣,它不是應該是與y軸的距離嗎?
http://i.imgur.com/DC7DptE.jpg
![](https://i.imgur.com/DC7DptE.jpg)
問題二:如上圖示,為什麼要用減號呢?
懇請大大教導><
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推
05/25 23:32, , 1F
05/25 23:32, 1F
→
05/25 23:32, , 2F
05/25 23:32, 2F
→
05/25 23:32, , 3F
05/25 23:32, 3F
我看不懂題目意思><可以麻煩您畫張圖嗎><
推
05/25 23:43, , 4F
05/25 23:43, 4F
→
05/25 23:43, , 5F
05/25 23:43, 5F
→
05/25 23:49, , 6F
05/25 23:49, 6F
→
05/25 23:52, , 7F
05/25 23:52, 7F
→
05/25 23:54, , 8F
05/25 23:54, 8F
→
05/25 23:57, , 9F
05/25 23:57, 9F
→
05/26 00:01, , 10F
05/26 00:01, 10F
→
05/26 00:39, , 11F
05/26 00:39, 11F
Ix'=Ix+AL2,其中的L是兩形心軸的距離,那照理論來說,應當是我寫的那樣阿……
→
05/26 00:40, , 12F
05/26 00:40, 12F
我還是不懂><
→
05/26 00:42, , 13F
05/26 00:42, 13F
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05/26 00:42, , 14F
05/26 00:42, 14F
※ 編輯: enger2567 (101.8.141.170), 05/26/2015 15:45:25
※ 編輯: enger2567 (101.8.141.170), 05/26/2015 15:45:56
推
05/27 17:50, , 15F
05/27 17:50, 15F
![](https://i.imgur.com/EjzyXbZ.jpg)
這題這樣子我懂了,非常謝謝你!!
→
05/28 17:31, , 16F
05/28 17:31, 16F
您說到重點了@@,y軸形心軸可以隨意更換?
→
05/28 17:33, , 17F
05/28 17:33, 17F
※ 編輯: enger2567 (101.12.252.54), 05/29/2015 21:13:05
※ 編輯: enger2567 (101.12.252.54), 05/29/2015 21:14:01
→
05/29 23:52, , 18F
05/29 23:52, 18F
→
05/29 23:54, , 19F
05/29 23:54, 19F
→
05/29 23:56, , 20F
05/29 23:56, 20F
→
05/29 23:58, , 21F
05/29 23:58, 21F
→
05/30 00:00, , 22F
05/30 00:00, 22F
→
05/30 00:02, , 23F
05/30 00:02, 23F
→
05/30 00:04, , 24F
05/30 00:04, 24F