3.3摩擦力(国外英文资料).doc

3.3摩擦力(国外英文资料) The high school physics classroom teaching plan date Subject Section 3.3 friction Class type The new medium (3 hours) teach learn order mark Knowledge and skills 1. know the conditions of sliding friction, sliding friction law. Understanding the dynamic friction coefficient and contact each other to know the matter Materials and contact surface roughness on the body, will determine the direction of the sliding friction force. 2. can use to calculate the sliding friction sliding friction formula. 3. understanding of static friction law, know the range of static friction force and the maximum value. 4. know the maximum static friction is slightly larger than the sliding friction. 5. according to the equilibrium condition of objects to simply calculate the magnitude of static friction. The process and method 1. of students using physical language analysis, thinking, ability to describe friction concepts and laws. 2. students of experimental inquiry ability. 3. let the students learn to control variables and experimental conditions in the experiment. 4. through the experiment, cultivate students ability to analyze and solve problems. Emotional attitude and values 1. based on the experimental and life examples to stimulate student interest in learning. 2. students practice cognition (Law) -- Practice (solving practical problems) thoughts. 3. issues in the study, to cultivate the main contradiction, ignore the thinking method of secondary factors. teach learn heavy Point, Hard spot The focus of teaching The 1. sliding friction force calculation of the size and direction of the judge. 2. there is no judgment of static friction force and static friction force direction of the judge. The conditions and rules of 3. static friction, the correct understanding of the concept of maximum static friction. Teaching difficulties 1. there is no judgment of static friction force and static friction force direction of the judge. 2. simple calculation of static friction fo