問題詳情
1. 跳水選手由跳台起跳，約1秒到達最高點，而後漂亮入水，起跳至入水共歷時3秒。將選手視為一個質點，起跳處位於水面上15m，不計起跳處與入水處的水平距離，則該次跳水全程的平均速度量值為多少m ∕ s？
(A) 2
(B) 3
(C) 4
(D) 5
(A) 2
(B) 3
(C) 4
(D) 5
參考答案
答案：D
難度：非常簡單0.9
書單：沒有書單，新增
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