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人教版高中物理第一册第五章《曲线运动》中的第五节“向心力向心加速度”一节中,演示实验“用向心力演示器测定向心力的大小与m、ω、r的关系”实验时,我是这样设计了教学思路:让学生在课前准备好了一大一小两个橡皮球和一段细线,进行演示实验前,让学生用细线系住质量较小的橡皮球,手执细线的另一端让小球在比较光滑的水平桌面上作近似匀速圆周运动,在保证细线长度不变、转速基本不变
In the fifth section of “Curve Movement” in the fifth edition of “The Curvilinear Movement” of the PEP Physics Book One, “Decent Force Centripetal Acceleration,” the demonstration experiment “measures centripetal force with centripetal force demonstrators and m, ω, r The relationship "In the experiment, I designed the teaching idea so that the students prepared a large and small two rubber balls and a thin line before the class, before the demonstration experiment, let students use a thin line to tie the quality The small rubber ball holds the other end of the thin line so that the ball moves on the relatively smooth horizontal table to make an approximately uniform circular motion. The length of the thin wire is kept constant and the rotation speed is basically unchanged.