[問題] 台電物理
第25.這題很簡單,只是我觀念不好
特此問加強,才可應付延伸的題目…
這題是位能u=mgh,去算
高度我以為是根號2L
,怎麼看出是1/2L
請高手點點醒我
謝謝
http://i.imgur.com/oMsC8AQ.jpg
![](https://i.imgur.com/oMsC8AQ.jpg)
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 180.217.245.97
※ 文章網址: https://www.ptt.cc/bbs/Examination/M.1468566629.A.263.html
推
07/15 15:18, , 1F
07/15 15:18, 1F
→
07/15 15:19, , 2F
07/15 15:19, 2F
→
07/15 15:19, , 3F
07/15 15:19, 3F
推
07/15 15:20, , 4F
07/15 15:20, 4F
→
07/15 15:42, , 5F
07/15 15:42, 5F
→
07/15 15:44, , 6F
07/15 15:44, 6F
→
07/15 16:27, , 7F
07/15 16:27, 7F
![](https://i.imgur.com/dKYOWFz.jpg)
→
07/15 16:30, , 8F
07/15 16:30, 8F
→
07/15 16:56, , 9F
07/15 16:56, 9F
推
07/15 17:46, , 10F
07/15 17:46, 10F
推
07/15 20:31, , 11F
07/15 20:31, 11F
討論串 (同標題文章)