3.3摩擦力（3.3 friction）.docVIP

3.3摩擦力（3.3 friction） High school physics classroom teaching plan day and month Topic Section 3.3 friction Class type New instruction (3 hours) teach learn order mark Knowledge and skills 1. know the conditions of the sliding friction and understand the law of the sliding friction The material of the body is related to the roughness of the contact surface and will determine the direction of the sliding friction force 2., the sliding friction formula can be used to calculate the sliding friction 3. know the law of static friction, and know the range of static friction and its maximum value 4. it is known that the maximum static friction is slightly greater than the sliding friction force 5. simply calculate the magnitude of the static friction according to the balance condition of the object Process and method 1. develop students ability to analyze, think, and describe the concepts and laws of friction using physical language 2. cultivate students experimental inquiry ability 3. let students learn how to control variables and experimental conditions in the experiment 4., through their own hands-on experiments, to train students ability to analyze problems and solve problems Emotion, attitude and values 1. stimulate students interest in learning by using experiments and life examples 2. train students to practice - the knowledge (Law) - Practice (to solve practical problems) thinking 3., in the study of the problem, we should train the thinking method of stressing the main contradiction and ignoring the minor factors teach learn heavy Point, Hard spot Teaching emphasis 1. calculation of the magnitude of sliding friction and the determination of its direction 2. whether the static friction is judged or not, and the direction of the static friction force is determined 3., the conditions and laws of static friction force, and correctly understand the concept of maximum static friction. Teaching difficulties 1. whether the static friction is judged and the direction of the