题目.(2013年江苏卷第5题)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1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1题目特点1.1条件较隐蔽,乍一看困难本题以运动的白球与一静止的灰球碰撞,只给出频闪照片示意图,而无其他定量条件,学生读完后,不知从何下 (Jiangsu Volume 5 in 2013) on the horizontal plane, a white ball collides with a stationary gray ball, the two balls are of equal mass, and the stroboscopic photograph of the collision process is shown in Figure 1, from which it can be inferred that during the collision the system Loss of kinetic energy accounts for about 1 before the collision kinetic energy characteristics 1.1 conditions are more subtle, at first glance difficulties This question to the motion of the white ball and a stationary gray ball collision, only give a schematic diagram of stroboscopic photos, and no other quantitative conditions, students read After that, I do not know where to go