2013 Jiangsu Question 5 Single-choice Differentiating 2013_江苏卷 (物理) 5. (3分)水平面上,一白球与一静止的灰球碰撞,两球质量相等。碰撞过程的频闪照片如图所示,据此可推断,碰撞过程中系统损失的动能约占碰撞前动能的( ) A. 30%B. 50%C. 70%D. 90% Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →