問題詳情
5. 在大氣中飛行的民航飛機，與在太空中沿圓形軌道運行的人造衛星，都受到地球重力的作用。下列有關民航飛機與人造衛星的敘述，何者正確？
(A)飛機在空中飛行時，機上乘客受到的地球重力為零
(B)人造衛星內的裝備受到的地球重力為零，因此是處於無重量的狀態
(C)人造衛星在圓形軌道上等速率前進時，可以不須耗用燃料提供前行的動力
(D)飛機在空中等速率前行時，若飛行高度不變，則不須耗用燃料提供前行的動力
(A)飛機在空中飛行時，機上乘客受到的地球重力為零
(B)人造衛星內的裝備受到的地球重力為零，因此是處於無重量的狀態
(C)人造衛星在圓形軌道上等速率前進時，可以不須耗用燃料提供前行的動力
(D)飛機在空中等速率前行時，若飛行高度不變，則不須耗用燃料提供前行的動力
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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