問題詳情
17. 一輛公車發現前方有障礙物時，駕駛立即緊急煞車，在車子滑行的過程中，下列敘述何者正確？
(A)速度為零
(B)速度向後
(C)加速度向前
(D)加速度向後
(E)加速度恆為零
(A)速度為零
(B)速度向後
(C)加速度向前
(D)加速度向後
(E)加速度恆為零
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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