论文部分内容阅读
笔者从圆周运动说起,谈复合场中“等效重力”及其应用.1从圆周运动说起圆周运动是高中物理常见的模型之一,涉及的物理问题常有最大速度、最小速度、物体与轨道之间的压力等.而常用的物理规律是牛顿第二定律、牛顿第三定律、动能定理、能量守恒等.学生通过对基础知识的学习已经能够熟练掌握竖直平面内的圆周运动.如图1所示,一质量为m的小球在一光滑圆轨道内侧做竖直平面内的圆周运动,其中A、B为圆轨道最高点和最低点,P、Q分别是其圆周上的其他任意两点.如图各点的受力分析和速度分析不难得出:
Speaking from the circular motion, talking about the composite field “equivalent gravity ” and its application.1 circular motion from the circular motion is one of the common high school physics model, the physical problems involved often have maximum speed, minimum speed , The pressure between the object and the track, etc .. The common physical laws are Newton’s second law, Newton’s third law, kinetic energy theorem, energy conservation, etc. Students through the basic knowledge of learning has been able to master the vertical plane of the circle As shown in Figure 1, a mass of m ball in a smooth circular orbit inside the vertical plane to do circular motion, where A, B for the highest point and the lowest point of the circular orbit, P, Q, respectively, is its circumference On any other two points as shown in Figure stress analysis and speed analysis is not difficult to draw: