笔者在讲解一类碰撞类题目时,总觉得此运动模型用得不够彻底,意犹未尽,于是产生了改编的想法。一、原题及其解答如图1所示,质量M=2kg的长木板B静止于光滑水平面上,B的右边放有竖直固定挡板,B的右端距离挡板S,现有一小物体A(可视为质点)质量为m=1kg,以初速度v_0=6m/s从B的左端水平滑 When I explain a class of collision problems, I always felt that this model of exercise was not used thoroughly enough and I did not hesitate to give up the idea of ​​adaptation. First, the original title and its solution As shown in Figure 1, the quality of M = 2kg long wooden board B resting on a smooth horizontal surface, B on the right side of the vertical fixed baffle, B right baffle S, the existing small objects A (can be regarded as the mass) mass m = 1kg, with the initial velocity v_0 = 6m / s from the left of B horizontal slide