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6. 右圖中 ,桌面光滑 ,甲、乙為二磁鐵,正相吸在一起 ,且已知此時二者間相吸之磁力大小=100N。今以一水平力 F=30N 拉動整個系統 ,使二者一起運動,若甲之質量為 2kg,乙之質量為 1kg
問題詳情
6. 右圖中 ,桌面光滑 ,甲、乙為二磁鐵,正相吸在一起 ,且已知此時二者間相吸之磁力大小=100N。今以一水平力 F=30N 拉動整個系統 ,使二者一起運動,若甲之質量為 2kg,乙之質量為 1kg,則甲、乙接觸面間之正向力大小=
(A)0
(B)10 N
(C)20 N
(D)80 N
(E)120 N。
參考答案
答案:D
難度:非常困難0
統計:A(1),B(0),C(0),D(0),E(0)
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