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5. 熱氣球載有沙包 2 包時,以加速度 2a 上升;載有沙包 8 包時,則以加速度 a 下降。若不計氣球本身重量及沙包的浮力,而欲使熱氣球以 的加速度上升時,應載沙包若干?(設氣球所受的浮力值固定)
問題詳情
5. 熱氣球載有沙包 2 包時,以加速度 2a 上升;載有沙包 8 包時,則以加速度 a 下降。若不計氣球本身重量及沙包的浮力,而欲使熱氣球以
的加速度上升時,應載沙包若干?(設氣球所受的浮力值固定)
(A) 3
(B) 4
(C) 5
(D) 6
(E) 7 包。
參考答案
答案:[無官方正解]
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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