[解題] 國三理化 - 力
(ex)
A
┌──┐ B
F │ ├──┐
─→│ │ │
│ │ │
──┴──┴──┴────
有一作用力 F = 30 N 作用在一光滑平面的兩個物體A、B上，A =3kg B=2kg，
試問 (1) 整個系統的加速度a為多少
(2) 請問A對B物體的作用力為多少?
(3) 請問B對A物體的作用力為多少?
想法: (1) F=ma => 30 = (3+2)a => a=6 (m/s^2)
(2)(3) 知道A對B和B對A此為作用力與反作用力 但是根據我之前的想法應該是
如下圖這樣畫的
3kg
┌──┐ 2kg
30N │ ├──┐
─→│18N │12N │
│ │ │
──┴──┴──┴────
這樣A對B和B對A的作用力是哪個 我有一點搞不太清楚 請各位大大
解答一下
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◆ From: 140.128.127.113
※ 編輯: markpower 來自: 140.128.127.113 (10/13 13:56)
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10/13 13:53, , 1F
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