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8、一力常數為400 N/m的彈簧,橫放於一光滑平面上,一端固定於一壁,有一質量4 kg的木塊以5 m/s速度沿彈簧軸線撞擊彈簧的另一端,則彈簧最大的壓縮量為多少m? (A) 0.25 (B) 0.4
問題詳情
8、一力常數為400 N/m的彈簧,橫放於一光滑平面上,一端固定於一壁,有一質量4 kg的木塊以5 m/s速度沿彈簧軸線撞擊彈簧的另一端,則彈簧最大的壓縮量為多少m?
(A) 0.25
(B) 0.4
(C) 0.5
(D) 0.75。
參考答案
答案:C
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
上一篇 :
3.下列何者不是健康促進學校的六大範疇之一?(A)校園公共政策的制訂(B)支持性的環境(C)團體的健康技能(D)健康服務
下一篇 :
填充題:每格5分,共20分1、一質量2.0公斤、速率為2公尺∕秒的甲球和質量3.0公斤、速率為4公尺∕秒的乙球,在一直線上同向進行,做正向彈性碰撞。求撞後乙球的速度量值為【 (1) 】公尺∕秒。
資訊推薦
9、不計空氣阻力,質點以速率v自地面向上發射,最遠達距地面3R(R為地球半徑),然後落下,當質點距地面高度為R時,其運動速率為何? (A) (B) (C) (D) (E) 。
2、一人造衛星質量m以橢圓軌道繞地球運轉,距離地球中心最近的距離為R,最遠的距離為2R,設地球質量為M,重力常數為G,則衛星在最近和最遠處動能差為【 (2) 】。
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