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2015年高考理综全国Ⅰ卷第35题,是有关3个物体相继碰撞的物理部分压轴题,它涉及中学物理主干知识动量守恒和机械能守恒,而且需要运用不等式、判别式、二次函数及其图像等数学知识求解,是注重物理情境、巧用物理规律和妙用数学方法去解决实际问题的好题,既体现新课标思想,又锤炼物理思维,是一道数理结合且具有较高选拔功能的创新题。若对原题稍稍进行拓展,则会出现更上一层楼的景象。原题如图1,在足够长的光滑水平面上,物体
2015 college entrance examination rationale for comprehensive national volume Ⅰ 35, is a physical part of the three objects collided collision part of the problem, which involves high school physical backbone knowledge of conservation of momentum and mechanical energy conservation, and the need to use inequalities, discriminant, quadratic function and its Image and other mathematical knowledge to solve, is to pay attention to the physical situation, skillfully use the laws of physics and magical mathematical methods to solve practical problems, not only reflects the new curriculum standard thinking, but also temper the physical thinking is a combination of mathematical and has a high selection function Innovative questions. If the original title slightly expanded, there will be a higher level of sight. The original title shown in Figure 1, long enough smooth surface, objects