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17. 如圖(二)所示,一物體置放於粗糙之斜面上。若物體之重量 W 為 300 N,靜摩擦係數 µ s為 0.5,斜面之傾斜角為 30o,則欲阻止物體滑下斜面所需之最小作用 P 的大小為多少 N?(
問題詳情
17. 如圖(二)所示,一物體置放於粗糙之斜面上。若物體之重量 W 為 300 N,靜摩擦係數 µ s為 0.5,斜面之傾斜角為 30o,則欲阻止物體滑下斜面所需之最小作用 P 的大小為多少 N?( 提示:sin30o= 0.5,cos 30o= 0.866 )
(A) 184.8
(B) 75.5
(C) 20.1
(D) 15.2
參考答案
答案:C
難度:適中0.5
統計:A(2),B(0),C(2),D(0),E(0)
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