問題詳情
1.一個4.0kg之木塊以兩條細弦連接至一固定的鉛垂桿子上下處，並以此桿為軸作等速率旋轉（如附圖）。若已知上方細弦的張力為80N，重力加速度n=98m/s2。求
(1)下方細弦的張力為__________N。
(1)下方細弦的張力為__________N。
參考答案
答案：B
難度：簡單0.725131
統計：A(63),B(554),C(38),D(16),E(0)
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