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在运动学中,有许多习题涉及的物理过程复杂,物理量较多,如何灵活地将所学知识与具体问题结合起来分析,快捷准确求解?下面试举几例,供读者参考。一、巧选公式匀变速直线运动公式涉及5个物理量:初速度(v0)、末速度(v1)、加速度(a)、时间(t)、位移(s)等。如何根据已知量,快捷准确求出未知量,除了认清运动规律,注意速度、加速度、位移的矢量外,选择合适的公式也至关重要。
In kinematics, there are many physical problems involved in the complex process, the physical quantity is more, how to flexibly combine the knowledge and the specific problem analysis, fast and accurate solution? Here are some examples for readers reference. First, the clever selection formula uniform speed change linear motion formula involves five physical quantities: initial velocity (v0), final velocity (v1), acceleration (a), time (t), displacement (s) and so on. How to find the unknown quantity quickly and accurately based on the known quantity, besides recognizing the law of motion and paying attention to the vector of velocity, acceleration and displacement, it is also very important to choose the appropriate formula.