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阿智將石頭「鉛直上拋」到高點後落回原處,上抛過程未碰到天花板且阻力及浮力很小可忽略,如右圖所示,【題組】39.關於石頭的運動情形,下敘述何者正確?(A)達最高點時,速度為0(B)達最高點時,加速度為0
問題詳情
阿智
將石頭「鉛直上拋」到高點後落回原處,上抛過程未碰到天花板且阻力及浮力很小可忽略,如右圖所示,
【題組】39.關於石頭的運動情形,下敘述何者正確?
(A)達最高點時,速度為0
(B)達最高點時,加速度為0
(C)石頭上升的過程中,加速度方向向上
(D)石頭上升的過程中,加速度越來越小。
參考答案
答案:A
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