問題詳情
66. 有一輕彈簧彈力常數 k = 400 nt/m自然垂掛於天花板，下端吊掛一重物質量為1 kg。若用手自平衡位置下拉重物 10 cm 後由靜止狀態開始釋放，問重物從最低點到最高點費時多久？
(A)π/80
(B)π/40
(C)π/20
(D)π/10
(A)π/80
(B)π/40
(C)π/20
(D)π/10
參考答案
答案：C
難度：適中0.461538
統計：A(4),B(15),C(24),D(4),E(0)
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