[理工] [動力]線動量守恆
題目:http://ppt.cc/sFya 第一題
問題:題目上沒有 只是黃鈺老師書上有寫要求車子所能到達的最大速度
上面有寫 當車子速度到達最大值時 繩子應呈現鉛直 原因是?
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