問題詳情
20.在理想彈簧的彈性限度之內，某理想彈簧放置在光滑水平桌面上，一側緊靠牆面，另一側放置一小球，若移動小球將彈簧壓縮x後釋放，可將小球以K的動能彈出，則將彈簧壓縮量3x後釋放，小球彈出的動能為何？
(A) 3K
(B) 6K
(C) 9K
(D) 12K
(A) 3K
(B) 6K
(C) 9K
(D) 12K
參考答案
答案：C
難度：適中0.622222
統計：A(9),B(8),C(28),D(0),E(0)
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