問題詳情
5. 假設一物體之位移函數 
，其中S以公尺表示，t以秒表示，當t =3秒時之加速度為何？
(A) 21 m / 
(B) 38 m / 
(C) 58 m / 
(D) 98 m / 
參考答案
答案：B
難度：簡單0.888889
統計：A(0),B(16),C(1),D(1),E(0)
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