問題詳情
39. 如圖(十八)所示,在槓桿支點的左側15 cm及右側10 cm處,分別掛上甲、乙兩重物,此時槓桿保持水平平衡。若將甲的懸掛位置向右移動3 cm,在忽略摩擦力及槓桿質量的影響下,乙的懸掛位置該如何移,甲動,才能使槓桿仍然保持水平平衡?
(A)向左移2 cm
(B) 向左移3 cm
(C)向右移2 cm
(D)向右移3 cm
參考答案
無參考答案
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