第二章 相互作用第9课时 共点力的静态平衡(重点突破课)
第9课时 共点力的静态平衡(重点突破课)考点一 物体的受力分析课时跟踪检测考点二 共点力的平衡问题考点三 整体法与隔离法解决多体平衡问题返回考点一 物体的受力分析高中物理中凡是涉及“力”的问题,都要进行受力分析,所以受力分析是学生的一项基本功,但学生在选取研究对象进行分析时,常犯“漏力”“添力”“错力”等错误。返回1.受力分析的四个步骤返回2.受力分析的两个技巧(1)除了根据力的性质和特点进行判断,假设法是判断弹力、摩擦力有无及方向的常用方法。(2)善用转换研究对象法,尤其是弹力、摩擦力的方向不易判定的情形,可以分析相接触物体的受力,再应用牛顿第三定律判定。返回[典例]如图所示,物块A放在直角...
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