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【教学目标】知识与技能:一个物体在另一个物体表面运动时,接触面发生摩擦,会产生摩擦力;摩擦力的大小与物体接触面的光滑程度及物体的重量有关。过程与方法:测量摩擦力的大小;推测、设计实验检验摩擦力与接触面和物体重量的关系;做摩擦力大小的对比实验。情感、态度与价值观:形成认真实验、根据数据得出结论的科学精神。【教学重点】用实验探究摩擦力大小与物体接触面粗糙程度及物体重量
【Teaching Objectives】 Knowledge and Skills: When an object moves on the surface of another object, friction occurs on the contact surface and friction force is generated. The friction force is related to the smoothness of the contact surface of the object and the weight of the object. Process and method: measuring the size of friction; speculation, design experiments to test the relationship between friction and contact surface and the weight of the object; to do friction experiments. Emotions, Attitudes and Values: A Scientific Spirit that Draws Serious Experiments, Concludes Based on Data. 【Teaching】 Experiment to explore the size of friction with the object contact surface roughness and object weight