碰撞过程中有三大考点需要注意:1.动量守恒或分方向动量守恒;2.非弹性碰撞中的动能损失陷阱;3.弹簧储存的最大弹性势能.例1(2011新课标全国卷)如图1所示,A、B、C三个木块的质量均为m,置于光滑的水平面上,B、C之间有一轻质弹簧,弹簧的两端与木块接触而不固连.将弹簧压紧到 Three important points in the collision process need to pay attention to: 1. Momentum conservation or Momentum momentum conservation; 2. Inelastic collision kinetic energy loss trap; 3. Spring stored maximum elastic potential energy Example 1 (2011 New Curriculum National Volume) such as As shown in Fig. 1, the quality of three blocks A, B and C is m, placed on a smooth horizontal plane. There is a light spring between B and C, and both ends of the spring are in contact with the block without being connected. Press the spring onto it