請教一題高中物理..謝謝
如題...
將一長度L(公尺)、線密度d(公斤/公尺)的的均勻圓形鐵鍊套在一個頂角角度為a的
光滑圓錐上,若這個鐵鍊可以恰好圈住圓錐而不會滑落到圓錐底部, 試問此時鐵鍊的
張力為若干?(重力加速度為g)
參考答案為 (Ldg/2*pi)*cot(a/2)
請問是怎麼解出來的呢??
煩請諸位高手不吝賜教..謝謝..
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.43.65.233
推
03/22 22:57, , 1F
03/22 22:57, 1F
推
03/22 23:17, , 2F
03/22 23:17, 2F
→
03/22 23:18, , 3F
03/22 23:18, 3F
→
03/22 23:18, , 4F
03/22 23:18, 4F
→
03/22 23:20, , 5F
03/22 23:20, 5F
→
03/22 23:20, , 6F
03/22 23:20, 6F
→
03/22 23:27, , 7F
03/22 23:27, 7F
→
03/22 23:27, , 8F
03/22 23:27, 8F
推
03/22 23:29, , 9F
03/22 23:29, 9F
推
03/22 23:30, , 10F
03/22 23:30, 10F
→
03/22 23:30, , 11F
03/22 23:30, 11F
→
03/22 23:30, , 12F
03/22 23:30, 12F
推
03/22 23:37, , 13F
03/22 23:37, 13F
→
03/22 23:37, , 14F
03/22 23:37, 14F
→
03/22 23:39, , 15F
03/22 23:39, 15F
→
03/22 23:40, , 16F
03/22 23:40, 16F
推
03/22 23:43, , 17F
03/22 23:43, 17F
→
03/22 23:43, , 18F
03/22 23:43, 18F
→
03/22 23:45, , 19F
03/22 23:45, 19F
推
03/22 23:46, , 20F
03/22 23:46, 20F
→
08/13 15:31, , 21F
08/13 15:31, 21F
→
09/17 10:10, , 22F
09/17 10:10, 22F
→
09/17 13:25, , 23F
09/17 13:25, 23F
→
11/09 11:00, , 24F
11/09 11:00, 24F
→
01/02 14:21,
5年前
, 25F
01/02 14:21, 25F
→
07/06 21:51,
4年前
, 26F
07/06 21:51, 26F
討論串 (同標題文章)
以下文章回應了本文:
完整討論串 (本文為第 1 之 3 篇):