《水的浮力》一课中,有个实验让学生测量水的浮力大小变化,它是要求学生用一个钩码来测量的。在教学中我发现这个实验有一些缺点:实验用的钩码的质量是50克,重量约是0.5牛顿,它在水中受到的浮力约是0.1牛顿,而学生用的测力计的最小刻度是0.1牛顿。要使一个钩码在水中分几个层次浸入,学生不易把握,且数据在测 In an experiment entitled “Buoyancy of Water,” an experiment in which students measured the buoyancy of water changes in size requires that students measure with a hook code. In teaching, I found this experiment has some disadvantages: the quality of the experimental hook code is 50 grams, weighs about 0.5 Newton, its buoyancy in water is about 0.1 Newton, and students with the smallest scale is 0.1 Newton. To make a hook in several sub-levels in the water, students are not easy to grasp, and the data is measured