2019高考物理二轮第一部分力学第二板块第1讲应用“动力学观点”破解力学计算题课件20190218124.ppt

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力学 计算题第二板块怎么考 怎么解1.牛顿运动定律与匀变速直线运动规律相结合 动力学观点2.能量问题与动量问题相结合能量观点 +动量观点第 1讲应用 “动力学观点 ”破解 力学计算题考法 学法命题点一匀变速直线运动规律的应用第 1 讲在草纸上画出运动过程示意图,找出各运动过程中的速度关系、位移关系等采用什么方法?匀变速直线运动的公式用到什么规律?跑向折返线时必经历的过程:匀加速、匀减速,可能经历匀速过程;跑回起点线时必经历匀加速过程,可能经历匀速过程运动情景是什么?关键点拨命题点二牛顿运动定律的综合应用第 1 讲命题点三动力学的两类典型模型第 1 讲直线运动规律、牛顿第二定律规律理想模型法、假设法受力分析、画示意图判断工件一直加速还是先加速再匀速方法匀减速直线运动 匀减速直线运动匀加速直线运动、 (匀速直线运动 )模型CD传送带运动时,工件在 CD传送带上的运动CD传送带静止时,工件在 CD传送带上的运动工件在 AB传送带上的运动过程

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