問題詳情
4. 一物沿直線運動時之位置(x)對時間(t)的關係如附圖，哪一段表示速度為負，而加速度為正？ 
(A) AB段
(B) BC段
(C) CD段
(D) DE段
(A) AB段
(B) BC段
(C) CD段
(D) DE段
參考答案
答案：[無官方正解]
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)
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