有關理化的力與運動的問題 - 運動
By Ethan
at 2007-06-25T00:00
at 2007-06-25T00:00
Table of Contents
1.傘兵由飛機上跳下,當傘張開後速度減慢的期間,傘兵所受的合力方向為何?(A)合力向上*(B)合力向下(C)合力可能為零(D)無法判定2.當太空艙繞地球飛行時,下列何者錯誤?(甲)若太空人在艙內秤重,則重量為零;(乙)地球對太空艙的吸引力與太空艙所需的向心力互相抵消,故太空艙受力為零;(丙)依萬有引
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運動
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By Dorothy
at 2007-06-25T07:18
at 2007-06-25T07:18
By Doris
at 2007-06-26T15:14
at 2007-06-26T15:14
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