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2022年2022年高考物理必考知识点归纳之二 .pdf

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1、1 高中物理知识归纳（二）-力学模型及方法1连接体模型是指运动中几个物体叠放在一起、或并排在一起、或用细绳、细杆联系在一起的物体组。解决这类问题的基本方法是整体法和隔离法。整体法是指连接体内的物体间无相对运动时,可以把物体组作为整体，对整体用牛二定律列方程隔离法是指在需要求连接体内各部分间的相互作用(如求相互间的压力或相互间的摩擦力等)时，把某物体从连接体中隔离出来进行分析的方法。m2 m1 FBAF1 F2 BAF2 2 斜面模型（搞清物体对斜面压力为零的临界条件）斜面固定：物体在斜面上情况由倾角和摩擦因素决定=tg物体沿斜面匀速下滑或静止 tg 物体静止于斜面 VB=R2g所以

2、AB 杆对 B 做正功，AB 杆对 A 做负功若 V0gR，运动情况为先平抛，绳拉直沿绳方向的速度消失即是有能量损失，绳拉紧后沿圆周下落机械能守恒。而不能够整个过程用机械能守恒。求水平初速及最低点时绳的拉力？换为绳时:先自由落体,在绳瞬间拉紧(沿绳方向的速度消失)有能量损失(即 v1突然消失),再 v2下摆机械能守恒例：摆球的质量为m，从偏离水平方向30的位置由静释放，设绳子为理想轻绳，求：小球运动到最低点A 时绳子受到的拉力是多少？4超重失重模型系统的重心在竖直方向上有向上或向下的加速度(或此方向的分量 ay)向上超重(加速向上或减速向下)F=m(g+a)；向下失重(加速向下或减速上升)F=

3、m(g-a)难点：一个物体的运动导致系统重心的运动文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6

4、 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T

5、6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10

6、T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z1

7、0T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z

8、10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7

9、Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z14 F m 1 到 2

10、到 3 过程中(1、3 除外)超重状态绳剪断后台称示数系统重心向下加速斜面对地面的压力?地面对斜面摩擦力?导致系统重心如何运动？铁木球的运动用同体积的水去补充5碰撞模型：特点，动量守恒；碰后的动能不可能比碰前大；对追及碰撞，碰后后面物体的速度不可能大于前面物体的速度。弹性碰撞：m1v1+m2v2=2211vmvm(1)222 12221mv21mv21mv21mv21(2)一动一静且二球质量相等的弹性正碰：速度交换大碰小一起向前；质量相等，速度交换；小碰大，向后返。一动一静的完全非弹性碰撞（子弹打击木块模型）mv0+0=(m+M)v20mv21=2M)vm(21+E损E损=20mv21一2M

11、)v(m21=02020EmMMm21m)(MMM)2(mmMkvvE损可用于克服相对运动时的摩擦力做功转化为内能E损=fd相=mgd相=20mv21一2M)v(m21a图 9 文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6

12、V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O

13、6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9

14、O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V

15、9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10

16、V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK1

17、0V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK

18、10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z15“碰撞过程”中四个有用推论弹性碰撞除了遵从动量守恒定律外，还具备：碰前、碰后系统的总动能相等的特征，设两物体质量分别为m1、m2，碰撞前速度分别为1、2，碰撞后速度分别为 u1、u2，即有：m11+m22=m1u1+m1u221m112+21m222=21m1u12+21m1u22碰后的速度 u1和 u2表示为：u1=2121mmmm1+2122mmm2u2=2112mmm1+2112mmmm2推论一：如对弹性碰撞的速度表达式进行分析，还会发现：弹性碰撞前、后，碰撞双方的相对速度大小相等

19、，即：u2u1=12 推论二：如对弹性碰撞的速度表达式进一步探讨，当m1=m2时，代入上式得：1221,vuvu。即当质量相等的两物体发生弹性正碰时，速度互换。推论三：完全非弹性碰撞碰撞双方碰后的速度相等的特征，即：v0 A B ABv0v sM vL 1 2 A v0文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V

20、9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10

21、V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK1

22、0V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK

23、10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 Z

24、K10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8

25、ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8

26、 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z16 u1=u2由此即可把完全非弹性碰撞后的速度u1和u2表为：u1=u2=212211mmmm例 3：证明：完全非弹性碰撞过程中机械能损失最大。证明：碰撞过程中机械能损失表为：E=21m112+21m22221m1u1221m2u22由动量守恒的表达式中得：u2=21m(m11+m22m1u1)代入上式可将机械能的损失E 表为 u1的函数为：E=22112)(mmmm

27、u12222111)(mmmmu1+(21m112+21m222)221m(m11+m22)2 这是一个二次项系数小于零的二次三项式，显然：当u1=u2=212211mmmm时，即当碰撞是完全非弹性碰撞时，系统机械能的损失达到最大值Em=21m112+21m222)(2)(2122211mmmm推论四：碰撞过程中除受到动量守恒以及能量不会增加等因素的制约外，还受到运动的合理性要求的制约，比如，某物体向右运动，被后面物体追及而发生碰撞，被碰物体运动速度只会增大而不应该减小并且肯定大于或者等于（不小于）碰撞物体的碰后速度。6人船模型：一个原来处于静止状态的系统，在系

28、统内发生相对运文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10

29、V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK1

30、0V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK

31、10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 Z

32、K10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8

33、ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8

34、 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z17 S1S2动的过程中，在此方向遵从动量守

35、恒：mv=MV ms=MS s+S=d s=dMmMM/m=Lm/LM载人气球原静止于高h 的高空，气球质量为M，人的质量为m若人沿绳梯滑至地面，则绳梯至少为多长？7弹簧振子模型：F=-Kx（X、F、a、v、A、T、f、EK、EP等量的变化规律）水平型竖直型8单摆模型：T=2gL（类单摆）利用单摆测重力加速度9波动模型：特点:传播的是振动形式和能量,介质中各质点只在平衡位置附近振动并不随波迁移。各质点都作受迫振动，起振方向与振源的起振方向相同，离源近的点先振动，没波传播方向上两点的起振时间差=波在这段距离内传播的时间波源振几个周期波就向外传几个波长。波从一种介质传播到另一种介质,频率不改变,

36、波速 v=s/t=/T=f 波速与振动速度的区别波动与振动的区别：波的传播方向质点的振动方向（同侧法）知波速和波形画经过 t 后的波形（特殊点画法和去整留零法）物理解题方法：如整体法、假设法、极限法、逆向思维法、物理模型20m M m O R 文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:C

37、W2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:

38、CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码

39、:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编

40、码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档

41、编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文

42、档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1

43、文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z18 v0A B C 法、等效法、物理图像法等模型法常常有下面三种情况（1）物理对象模型：用来代替由具体物质组成的、代表研究对象的实体系统，称为对象模型（也可称为概念模型），即把研究的对象的本身理想化常见的如“力学”中有质点、刚体、杠杆、轻质弹簧、单摆、弹簧振子、弹性体、绝热物质等；（2）条件模型：把研究对象所处的外部条件理想化，排除外部条件中干扰研究对象运动变化的次要因素，突出外部条件的本质特征或最主要的方面，从而建立的物理

44、模型称为条件模型（3）过程模型：把具体过理过程纯粹化、理想化后抽象出来的一种物理过程，称过程模型其它的碰撞模型：ABC1 2 A 文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD

45、4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 H

46、D4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6

47、HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6

48、 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T

49、6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10

50、T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z10T6 HD4M10N7S9E8 ZK10V9O6V3Z1文档编码:CW2X6N7Z1

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