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物理习题的解法多种多样,探索解题方法、提高学生解题能力是物理教学的重要内容。解决同一个问题时,切入点不同,效果大相径庭,因此,找准切入点是提高解题效率的关键。切入点一:两滑块各自质量与位移的乘积为一定值(即常数)例1如图1所示,光滑水平面OB与足够长的粗糙斜面BC交于B点。轻弹簧左端固定于竖直墙面,现用质量为m_1的滑块压缩弹簧至D点,
There are many solutions to the physical exercises, exploring the methods of solving problems and improving the students’ ability to solve problems is an important part of physics teaching. When solving the same problem, the entry points are different and the results are very different. Therefore, finding the right starting point is the key to improving the efficiency of problem solving. Point 1: The product of the mass and displacement of the two sliders is constant (ie, constant). Example 1 As shown in Figure 1, the smooth horizontal plane OB intersects with the long and rough bevel BC at point B. The left end of the light spring is fixed on the vertical wall, and the slider with the mass m_1 is used to compress the spring to point D,