2022年广东高考物理大二轮专题训练 .pdf

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1、2016 广东高考物理大二轮专题训练 2 必修 2 一、高考考点回顾年份全国新课标卷考点内容要求题号题型分值2013 万有引力定律及其应用20 选择6 2014 万有引力定律及其应用19 选择6 圆周运动向心力20 选择6 2015 平抛运动18 选择6 万有引力定律及其应用21 选择6 圆周运动向心力22 实验6 必修 2 是共同必修部分的内容，也是高考必考模块，这一模块共有三大块的内容：曲线运动（主要是抛体运动和圆周运动）、万有引力定律（主要涉及天体运动，三大宇宙速度）、机械能（主要包括功和功率，动能定理，机械能守恒定律）.从这几年的高考题可以看出，这部分试题的题型包括选择题、实验题，涉及

2、到的主题内容主要是曲线运动和万有引力，其中天体运动每年必有一道选择题；机械能主题下的内容没有出现在力学试题当中，而是结合在电磁学试题中去综合考查，每年高考中所占分值约为12 分.二、例题精选例 1如图所示，河宽200 m，一条小船要将货物从A 点运送到河对岸的B点，已知 AB连线与河岸的夹角 30，河水的流速v水5 m/s，小船在静水中的速度至少是()A.532 m/s B2.5 m/s C53 m/s D5 m/s【解析】用动态三角形法分析如图所示，使合速度与河岸夹角为，则当 v船与 v合垂直时，v船具有最小值则：v船 minv水sin 2.5 m/s.【答案】B 例 2 如图所示，距离水平

3、地面高为h 的飞机沿水平方向做匀加速直线运动，从飞机上以相对地面的速度v0依次从 a、b、c 水平抛出甲、乙、丙三个物体，抛出的时间间隔均为T，三个物体分别落在水平地面上的A、B、C三点，若AB1l、AC 2l，不计空气阻力，下列说法正确的是()A物体甲在空中运动的时间t甲t乙R1，故滑块 2 需要的向心力更大，故绳子拉力增大时滑块1 的摩擦力反而减小，且与角速度的平方呈线性关系，故A、D正确【答案】AD例 4如图所示，在火星与木星轨道之间有一小行星带假设该带中的小行星只受到太阳的引力，并绕太阳做匀速圆周运动下列说法正确的是().A太阳对各小行星的引力相同B各小行星绕太阳运动的周期均小于1 年

4、C小行星带内侧小行星的向心加速度值大于外侧小行星的向心加速度值D小行星带内各小行星圆周运动的线速度值大于地球公转的线速度值【解析】根据2rMmGF，小行星带中各小行星的轨道半径r、质量 m均不确 定，因 此 无 法 比 较 太 阳 对 各 小 行 星 引 力的 大小，选 项 A 错 误；根据rTmrMmG22)2(得，GMrT32，因小行星绕太阳运动的轨道半径大于地球绕太阳运动的轨道半径，故小行星的运动周期大于地球的公转周期，即大于一年，选项 B错误；根据marMmG2得2rGMa，所以内侧小行星的向心加速度值大于外侧小行星的向心加速度值，选项C 正确；根据rmvrMmG22，得rGMv，所以

5、小行星带内各小行星做圆周运动的线速度值小于地球公转的线速度值，选项D错误【答案】C例 5.如图所示，木板质量为M，长度为 L，小木块质量为 m，水平地面光滑，一根不计质量的轻绳跨过定滑轮分别与M和 m连接，小木块与木板间的动摩擦因数为，开始时木块静止在木板左端，现用水平向右的力将m拉至右端，拉力至少做功为()AmgL B2mgL文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:C

6、T1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:

7、CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码

8、:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编

9、码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档

10、编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文

11、档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5

12、文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5C2mgL DgLmM)(【解析】m缓慢运动至右端，拉力 F做功最小，其中 Fmg FT，FTmg，小木块位移为2L，所以mgLFLWF2.【答案】A 例 6(多选)如图所示，物体 A、B通过细绳及轻质弹簧连接在轻滑轮两侧，物体 A、B 的质量分别为m、2m，开始时细绳伸直，用手托着物体A使弹簧处于原长且 A与地面的距离为 h，物体 B静止

13、在地面上放手后物体A下落，与地面即将接触时速度为v，此时物体B 对地面恰好无压力，则下列说法中正确的是()A物体 A 下落过程中的任意时刻，加速度不会为零 B此时弹簧的弹性势能等于221mvmgh C此时物体 B处于平衡状态 D此过程中物体 A的机械能变化量为221mvmgh【解析】对物体 A 进行受力分析可知，当弹簧的弹力大小为mg时，物体 A的加速度为零，A错误；由题意和功能关系知弹簧的弹性势能为221mvmghEp，B错误；当物体 B对地面恰好无压力时，说明弹簧的弹力大小为2mg，此时 B所受合外力为零，恰好处于平衡状态，C正确；弹簧的弹性势能的增加量等于物体A的机械能的减少量)21(2

14、mvmgh，D正确【答案】CD例 7A、B 两个木块叠放在竖直轻弹簧上，如图所示，已知mAmB1 kg，轻弹簧的劲度系数为100 N/m.若在木块 A上作用一个竖直向上的力 F，使木块 A由静止开始以 2 m/s2的加速度竖直向上做匀加速运动.取 g10 m/s2.(1)求使木块 A竖直向上做匀加速运动的过程中，力F 的最大值是多少？(2)若木块 A竖直向上做匀加速运动，直到 A、B分离的过程中，弹簧的弹性文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P

15、4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1

16、P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT

17、1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:C

18、T1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:

19、CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码

20、:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编

21、码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5势能减少了 1.28 J，则在这个过程中力F对木块做的功是多少？【解析】(1)以 A为研究对象，由牛顿第二定律可得FmAgFBAmAa，所以当 FBA0 时，F最大，即 FmaxmAgmAa12 N.(2)初始位置弹簧的压缩量为x1mAgmBgk0.20 m A

22、、B分离时，FAB0，以B为研究对象可得FNmBgmBa，解得FN12 N 此时 x2FNk0.12 m A、B上升的高度 xx1x20.08 m A、B的速度 vAvBv2ax252 m/s 以 A、B作为一个整体，由动能定理得WFWN(mAmB)gx12(mAmB)v2WN Ep1.28 J 解得 WF0.64 J.【答案】(1)12 N(2)0.64 J 例 8.如图所示，在竖直平面内固定有两个很靠近的同心圆形轨道，外圆 ABCD光滑，内圆的上半部分BC D 粗糙，下半部分 BAD光滑.一质量为 m 0.2 kg的小球从外轨道的最低点A 处以初速度 v0向右运动，小球的直径略小于两圆的间

23、距，小球运动的轨道半径R0.2 m，取 g10 m/s2.(1)若要使小球始终紧贴着外圆做完整的圆周运动，初速度v0至少为多少？(2)若 v03 m/s，经过一段时间后小球到达最高点，内轨道对小球的支持力 FC2 N，则小球在这段时间内克服摩擦力做的功是多少？(3)若 v03.1 m/s，经过足够长的时间后，小球经过最低点A时受到的支持力为多少？小球在整个运动过程中减少的机械能是多少？【解析】(1)设此情形下小球到达外轨道的最高点的最小速度为Cv，则由牛文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X

24、8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3

25、X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z

26、3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10

27、Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A1

28、0Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A

29、10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6

30、A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5顿第二定律可得RmvmgC2由动能定理可知20221212mvmvmgRC，代入数据解得0v10 m/s.(2)设此时小球到达最高点的速度为Cv，克服摩擦力做的功为 W，则由牛顿第二定律可得RmvFmgCC2由动能

31、定理可知20221212mvmvWmgRC，代入数据解得 W 0.1 J(3)经足够长的时间后，小球在下半圆轨道内做往复运动.设小球经过最低点的速度为 vA，受到的支持力为FA，则由动能定理可知221AmvmgR根据牛顿第二定律可得RmvmgFAA2代入数据解得：63mgFAN 设小球在整个运动过程中减少的机械能为E，由功能关系有mgRmvE2021，代入数据解得：E0.561 J【答案】(1)10 m/s(2)0.1 J(3)6 N 0.561 J 例 9如图所示，在同一竖直平面内，一轻质弹簧一端固定，另一自由端恰好与水平线 AB平齐，静止放于倾角为53的光滑斜面上.一长为 L9 cm的轻质

32、细绳一端固定在O点，另一端系一质量为m 1 kg 的小球，将细绳拉至水平，使小球从位置C由静止释放，小球到达最低点D时，细绳刚好被拉断.之后小球在运动过程中恰好沿斜面方向将弹簧压缩，最大压缩量为x5 cm.(取 g10 m/s2，sin 53 0.8，cos 530.6)求：(1)细绳受到的拉力的最大值；(2)D点到水平线 AB的高度 h；(3)弹簧所获得的最大弹性势能Ep.【解析】(1)小球由 C到 D，由机械能守恒定律得：mgL 12mv21，文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 Z

33、X10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8

34、ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8

35、 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X

36、8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3

37、X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z

38、3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10

39、Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5解得 v12gL在 D点，由牛顿第二定律得Fmg mv21L由解得 F30 N 由牛顿第三定律知细绳所能承受的最大拉力为30 N.(2)由 D到 A，小球做平抛运动v2y2gh tan 53 vyv1联立解得 h16 c

40、m(3)小球从 C点到将弹簧压缩至最短的过程中，小球与弹簧系统的机械能守恒，即 Epmg(Lhxsin 53)，代入数据解得：Ep2.9 J.【答案】(1)30 N (2)16 cm(3)2.9 J 三、试题选编一、选择题（112 题为单项选择，在每小题给出的四个选项中只有一项符合题目要求.13 20 为多项选择，在每小题给出的四个选项中至少有两项符合题目要求.）文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 Z

41、X10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8

42、ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8

43、 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X

44、8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3

45、X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z

46、3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10

47、Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5 1 设太阳质量为M，某行星绕太阳公转周期为T，轨道可视作半径为r的圆 已知万有引力常量为G，则描述该行星运动的上述物理量满足()A2324TrGM B2224TrGMC3324TrGM D 234TrGM 2.如图所示，球网上沿高出桌面H，网到桌边的距离为L.某人在乒乓球训练中，从左侧 L/2 处，将球

48、沿垂直于网的方向水平击出，球恰好通过网的上沿落到右侧桌边缘设乒乓球运动为平抛运动则乒乓球()A在空中做变加速曲线运动 B在水平方向做匀加速直线运动 C在网右侧运动时间是左侧的2 倍 D击球点的高度是网高的2 倍 3如图所示，一根跨越光滑定滑轮的轻绳，两端各有一杂技演员(可视为质点)，a 站于地面，b 从图示的位置由静止开始向下摆动，运动过程中绳始终处于伸直状态，当演员 b 摆至最低点时，a 刚好对地面无压力，则演员a 的质量与演员 b 的质量之比 mamb为()A11 B21 C31 D41 4.如图所示，两次渡河时船相对水的速度大小和方向都不变，已知第一次实际航程为A至 B，位移为 s1，实

49、际航速为 v1，所用时间为 t1.由于水速增大，第二次实际航程为A至 C，位移为 s2，实际航速为 v2，所用时间为 t2，则()At2t1v2s2v1s1 Bt2t1v2s1v1s2 Ct2t1v2s2v1s1 Dt2t1v2s1v1s2 5.如图所示 A行星运行轨道半径为R0，周期为 T0，经长期观测发现其实际文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H

50、1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8H1V8 HQ8J6A10Z3X8 ZX10I2H10I3A5文档编码:CT1P4V8