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1.甲、乙兩粒質量相同的小石子,自同一高度以水平方向的初速拋出,落在平坦的地面上,已知甲的初速為乙的2倍。若不計空氣阻力,則下列敘何者錯誤?(A)甲的射程較大(B)落地時,甲的動能較大(C)落地時,兩
問題詳情
1.甲、乙兩粒質量相同的小石子,自同一高度以水平方向的初速拋出,落在平坦的地面上,已知甲的初速為乙的2倍。若不計空氣阻力,則下列敘何者錯誤?
(A)甲的射程較大
(B)落地時,甲的動能較大
(C)落地時,兩者的加速度相等
(D)兩者在空中的飛行時間相等
(E)落地時,甲的速度的鉛直分量較大
參考答案
答案:E
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