即时速度和加速度是力学中的两个重要概念,是高一物理教材的重点,又是教学中的难点。对刚进高中的学生来说,由于数学知识不足,生活经验缺乏,很难对“即时速度”有一明确深刻的理解。加上目前条件的限制,在讲授这两个概念时,一般学校都缺乏必要的简明的演 Instantaneous speed and acceleration are two important concepts in mechanics. They are the focus of high school physics textbooks, and they are difficult in teaching. For students who have just entered high school, due to lack of knowledge of mathematics and lack of life experience, it is difficult to have a clear and deep understanding of “immediate speed”. In addition to the limitations of current conditions, general schools lack the necessary concise presentations when teaching these two concepts.