[題目] 張力
_ ABC質量均為m
| 彈簧之彈性常數為K
O A 平衡如圖所示
| 現以一剪刀將A與天花板間繩子剪斷
O B 求剪斷瞬間,A與B之間細繩之張力
∥→彈簧
O C Ans:mg/2
算好久但是我算出來的答案一直是0 .....囧
我是先將ABC看成一個系統 整體加速度為g
然後對A作分析
(-mg) + (-T) = (-mg)
T = 0 ..囧
好奇怪喔....
有人可以幫幫我嗎? OAO
謝謝~~
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◆ From: 122.123.241.176
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10/30 20:18, , 1F
10/30 20:18, 1F
什麼意思阿?QQ
※ 編輯: andyisman 來自: 122.123.241.176 (10/30 20:22)
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10/30 23:20, , 5F
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終於懂了~ 謝謝大家!!!
特別感謝一樓的高手 !!
※ 編輯: andyisman 來自: 122.123.240.246 (10/31 08:10)
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