本通报二卷四期的读者来信栏发表了倪敦祥同志所写‘介绍陈杰夫老师的高中物理教学’一文,其中涉及运动按速度分类时,有这样的说法:“速度的改变,可有三种:第一,速率改变,方向不变;第二,方向改变,速率不变;第三,二者同时改变。属第一种情形的运动名叫:‘加速运动’。第二种情形的运动叫:‘匀加速运动’。第三种叫:‘变加速运动’。”显然,这种命名都不恰当,甚 This letter refers to the second letter of the fourth volume of the column wrote a letter sent by Comrade Ni Dunxiang ’Introduction to high school physics teaching Chen Jiefu’ article, which involves sports classified by speed, there is such a saying: “The speed of change, there are three: First, the rate of change, the direction of change; second, the direction of change, the same rate; third, the two change at the same time is the first case of the name of the movement: ’accelerated movement’ The second case of the movement is called: ’Uniform acceleration movement’. The third is called ’variable speed movement’. ”Obviously, this naming is not appropriate, and even