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本章中考动向本章是中考的重点内容,分值4—10分,在选择、填空、作图、计算、实验题都有其踪影,从近年中考命题看,杠杆的平衡条件、杠杆的分类、力臂的作图、滑轮的组装均有命题,功、功率、机械效率是近年中考的热点问题,主要考查功的概念及计算、功率的物理意义及计算,经常将功、功率、机械效率综合考查,难度中等,另外,以杠杆、斜面、滑轮、滑轮组为载体的探究题,在试卷中出现的几率也较高。
This chapter exams the direction of this chapter is the focus of the exam, score 4-10 points, in the choice, fill in the blanks, mapping, calculation, experiment questions have their traces, from the test in recent years, the balance of leverage conditions, lever classification, force Arm drawing, the assembly of pulleys are propositional, power, mechanical efficiency is the hot spot in recent years in the exam, the main test concept and calculation, the power of the physical meaning and calculation, often work, power, mechanical efficiency comprehensive examination , Medium difficulty, In addition, the lever, bevel, pulleys, pulley group as the carrier of inquiry, there is a higher probability in the papers.