問題詳情
29.附圖為一物沿直線運動之位置（x）對時間（t）的關係，哪一段表示速度為正，而加速度為負？
(A) AB
(B) BC
(C) CD
(D) DE。
(A) AB
(B) BC
(C) CD
(D) DE。
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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