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用通过砂轮飞出闪火星,汽车、自行车轮胎甩出的泥水等现象来说明物体作圆周运动时速度沿圆周的切线方向,学生往往感到难以接受。我在教学中增设了如图所示装置的演示实验,收到了较好的效果.这个实验装置简单易做,实验现象明显、可靠,下面就作介绍. 一、制作方法 1.选用一块边长为50厘米左右的方木板,板面尽可能光滑些.再把一张同样大小的白纸用胶水糊在木
With the phenomena of flying flash stars out of the wheel and mud water thrown off by the tires of cars and bicycles to illustrate the speed along the circumference of the tangential direction when the object is making circular motions, students often find it difficult to accept. In my teaching, I added a demonstration experiment of the device shown in the figure, and received good results. This experimental device is simple and easy to do, and the experimental phenomena are obvious and reliable. Here is an introduction. First, the production method 1. Select a side length For a square board of about 50 centimeters, the board surface is as smooth as possible. Use the same size white paper with glue paste on the wood.