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物理学是研究物体在时间和空间中的运动。某些物理量对于时间和空间的变化率可以成为高中物理复习中一个能揭示各部分内在联系的专题复习内容。一.课堂教学的要点 1、现行高中物理教本中出现的物理量对于时间的变化率有:v=△s/△t、α=△v/△t、F=△v/△t、F=△p/△p、 =△Φ/△t、 _自=△I/△t等(虽然,以上个别式子与教本在书写形式上有所不同,但是,本质上还是相同的)。 2.“物理量”、“物理量的变化量(即变化大小)”、“物理量的变化率(即变化快慢)”,是三个完全不同的概念。 3.物理量有矢量与标量之分,矢量的变化可以是大小变,也可以是方向变。 4.物理量对于时间的变化有均匀变化(线性)与不
Physics is the study of the movement of objects in time and space. The rate of change of certain physical quantities with respect to time and space can serve as a review of topics in high school physics that can reveal the intrinsic links of each part. I. Point of Classroom Instruction 1. The rate of change of physical quantity that occurs in the current high school physics textbook: v=Δs/Δt, α=Δv/Δt, F=Δv/Δt, F=△ p/Δp, =Δφ/Δt, _auto = ΔI/Δt, etc. (Although the above individual formulas differ from the textbooks in terms of writing, they are essentially the same). 2. The “physical quantity”, “the amount of change in the physical quantity (ie, the size of the change),” and “the rate of change in the physical quantity (ie, the rate of change)” are three completely different concepts. 3. The physical quantity has the points of vector and scalar. The change of the vector can be the size change or the direction change. 4. The physical quantity changes uniformly with time (linear) and not