《理论力学》习题三答案.doc

1、thrift of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has, n

2、o awareness to China also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good living

3、 of improve and hard, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects e

4、veryone has accountability. Four, future direction and improvement measures 1, belief and faith, strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Seco

5、nd is to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and “three represents“ important thought and the scientific Outlook on development, implement the partys basic program for the primary stage of socialism, adhere to the correct political o

6、rientation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to establi

7、sh correct world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively participate in the great practice of building socialism with Chinese characteristics. 2, keep the pu

8、rpose in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, .According to city discipline, and municipal organization Department requirem

9、ents, today we held “implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction“ topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in imp

10、lementation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before the

11、 meeting, the way we take surveys solicited a views, combed, related to team buildingproject work, cadres, cadres selection and other aspects of a total of 19, further defined the direction of rectification, enhancing the pertinence and effectiveness of democratic life. Good for this meeting, we req

12、uested the Standing Committee of the municipal party Committee, municipal Secretary General Tang Wenjin, the City Commission for discipline inspection Standing Committee Yang Xu, Jiang Jixue, Deputy Director of the personnel office, and other leading comrades present guidance allows us to warm appla

13、use for their welcome and thanks! Below, I first District Committee member of the 20XX team annual democratic meeting implementation of the corrective measures, as well as member of the team and of my own report guidelines for the implementation of the independent Commission against corruption state

14、ment invited leaders and comrades criticism. First, annual party on the 20XX team, Member of democratic life action plan implementation year 20XX, district democratic meeting a member of the team on “study and practice the scientific Outlook on development“ theme, find a project supporting strong en

15、ough, the industry well enough, urban construction management level needs to be improved, livelihood improvement needs to be strengthened, district team itself, such as the five aspects. Year of 20XX, we find out the problems mentioned above, based on actual Shunqing construction and development, co

16、nscientiously sum up improvements, achieving significant development results and effectiveness of their work. (A) highlight the project handle, maintain high growth of investment. Adhere to the strategy as a Foundation, carrying out projects to promote increased stamina important. One is to increase

17、 the intensity of projects towards. Actively seek national and provincial policy support, superior special transfer payments, a variety of additional income will top 700 million Yuan, a number of key infrastructure projects, livelihood projects, industrial projects into the cage. Second, increasing

18、the project attracts. This year a total of 23 signed a major project, of which 14 billion project, China Metallurgical group, vanke group, Guangdong hengda group, Taiwan Ruentex group, on the RI group, Shenzhen Kaisa, jifeng agricultural machinery, Mercedes-Benz, Audi 4S store and other large enterp

19、rises and projects have settled in Shunqing. Third, strengthen project construction. Annual implementation focus project 39 a, fixed assets investment total will breakthrough 12 billion yuan, created district yilai history high, South door dam, and five in shop old city transformation, and Ying Chin

20、a industrial concentrated district construction, and city main road construction, and Northeast steam Trade Center, and modern farmers industry Park, and vocational education city, and low rental, and also room construction, and features blocks build, and farmers market transformation, and “rural ve

21、rsion“ Street transformation, focus engineering speed up implementation, effectiveness obviously. Expected to be achieved this year, area-wide GDP 17 billion理论力学习题三答案一、单项选择题（本大题共 30 小题，每小题 2 分，共 60 分）1. 求解质点动力学问题时，质点的初始条件是用来（ C ） 。A、分析力的变化规律； B、建立质点运动微分方程；C、确定积分常数； D、分离积分变量。2. 在图 1 所示圆锥摆中，球 的质量为 ，绳长

22、 ，若 角保持不变，则小球的法向加速Mml度为（ C ） 。A、 ； B、 ；C、 ； D、 。singcosgtangtangc3. 已知某点的运动方程为 （ 以米计 , 以秒计， 、 为2bSSb常数） ，则点的轨迹为（ C ） 。A、是直线； B、是曲线； C、不能确定； D、抛物线。4. 如图 2 所示距地面 的质点 ，具有水平初速度 ，则该质点落HM0v地时的水平距离 与（ B ）成正比。lA、 ； B、 ； C、 ；D、 。H235. 一质量为 的小球和地面碰撞，开始瞬时的速度为 ，碰撞m1v结束瞬时的速度为 （如图 3） ，若 ，则碰撞前后质点2vv21动量的变化值为（ A ）

23、。A、 ； B、 ； vC、 ； D、 0。m36. 一动点作平面曲线运动，若其速率不变，则其速度矢量与加速度矢量（ B ） 。 A、平行； B、垂直； C、夹角随时间变化； D、不能确定。7. 三棱柱重 ，放在光滑的水平面上，重 的匀质圆柱体静止释放后沿斜面作纯滚动，则PQ系统在运动过程中（ A ） 。A、沿水平方向动量守恒，机械能守恒； B、动量守恒，机械能守恒；C、沿水平方向动量守恒，机械能不守恒； D、均不守恒。8. 动点 沿其轨迹运动时，下列几种情况中，正确的应该是（ A ） 。MA、若始终有 ，则必有 的大小等于常量；avvB、若始终有 ，则点 M 必作匀速圆周运动；图 1图 2图

24、 3thrift of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has,

25、 no awareness to China also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good livi

26、ng of improve and hard, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects

27、 everyone has accountability. Four, future direction and improvement measures 1, belief and faith, strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Se

28、cond is to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and “three represents“ important thought and the scientific Outlook on development, implement the partys basic program for the primary stage of socialism, adhere to the correct political

29、 orientation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to estab

30、lish correct world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively participate in the great practice of building socialism with Chinese characteristics. 2, keep the

31、purpose in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, .According to city discipline, and municipal organization Department requir

32、ements, today we held “implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction“ topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in i

33、mplementation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before t

34、he meeting, the way we take surveys solicited a views, combed, related to team buildingproject work, cadres, cadres selection and other aspects of a total of 19, further defined the direction of rectification, enhancing the pertinence and effectiveness of democratic life. Good for this meeting, we r

35、equested the Standing Committee of the municipal party Committee, municipal Secretary General Tang Wenjin, the City Commission for discipline inspection Standing Committee Yang Xu, Jiang Jixue, Deputy Director of the personnel office, and other leading comrades present guidance allows us to warm app

36、lause for their welcome and thanks! Below, I first District Committee member of the 20XX team annual democratic meeting implementation of the corrective measures, as well as member of the team and of my own report guidelines for the implementation of the independent Commission against corruption sta

37、tement invited leaders and comrades criticism. First, annual party on the 20XX team, Member of democratic life action plan implementation year 20XX, district democratic meeting a member of the team on “study and practice the scientific Outlook on development“ theme, find a project supporting strong

38、enough, the industry well enough, urban construction management level needs to be improved, livelihood improvement needs to be strengthened, district team itself, such as the five aspects. Year of 20XX, we find out the problems mentioned above, based on actual Shunqing construction and development,

39、conscientiously sum up improvements, achieving significant development results and effectiveness of their work. (A) highlight the project handle, maintain high growth of investment. Adhere to the strategy as a Foundation, carrying out projects to promote increased stamina important. One is to increa

40、se the intensity of projects towards. Actively seek national and provincial policy support, superior special transfer payments, a variety of additional income will top 700 million Yuan, a number of key infrastructure projects, livelihood projects, industrial projects into the cage. Second, increasin

41、g the project attracts. This year a total of 23 signed a major project, of which 14 billion project, China Metallurgical group, vanke group, Guangdong hengda group, Taiwan Ruentex group, on the RI group, Shenzhen Kaisa, jifeng agricultural machinery, Mercedes-Benz, Audi 4S store and other large ente

42、rprises and projects have settled in Shunqing. Third, strengthen project construction. Annual implementation focus project 39 a, fixed assets investment total will breakthrough 12 billion yuan, created district yilai history high, South door dam, and five in shop old city transformation, and Ying Ch

43、ina industrial concentrated district construction, and city main road construction, and Northeast steam Trade Center, and modern farmers industry Park, and vocational education city, and low rental, and also room construction, and features blocks build, and farmers market transformation, and “rural

44、version“ Street transformation, focus engineering speed up implementation, effectiveness obviously. Expected to be achieved this year, area-wide GDP 17 billionC、若某瞬时有 a，则点 M 的轨迹必为直线；vD、若某瞬时有 的大小为零，且点 M 作曲线运动，则此时速度必等于零。9、作一维运动的简谐振子，其拉格朗日量可写为（ A ） 。A、 B、 C、 D、21Lmxk21Lmx21Lkx0L10、一实心圆柱体，沿一斜面无滑动的滚下，下列说

45、法正确的是（ A ） 。A、机械能守恒，动量矩不守恒。 B、质心动量守恒。C、机械能不守恒，动量矩守恒。 D、没有守恒量11. 匀质杆 AB 重 G，其 A 端置于光滑水平面上， B 端用绳悬挂，如图 4 所示，取坐标系 O-xy，此时该杆质心 C 的 x 坐标 ，若将绳剪断，则（ C ） 。0cA、杆倒向地面的过程中，其质心 C 运动的轨迹为圆弧；B、杆倒至地面后, ； cC、杆倒至地面后, ；0xD、杆倒至地面后, 。c12. 如图所示平面机构， CD 连线铅直，杆 BC=BD，在如图 5 所示瞬时，角 ，杆 AB 水03平，则该瞬时点 A 和点 C 的虚位移大小之间的关系为 （ C ）

46、。A、 ； B、 ； Cr23r3C、 ； D、 。CA2113. 匀质圆盘半径为 ，质量为 m ，在半径为 R 的固定圆柱面内纯滚动,如图 6 所示,则圆盘r的动能为（ D ） 。A、 ； B、 ； 2Amr43T243TC、 ； D、 。)-(R1r-14. 一匀质杆 与匀质圆盘在圆盘中心 处铰接，在如图 7 示位置OA时， 杆绕固定轴 转动的角速度为 ，圆盘相对于杆 的角速OA度为 ，设 杆与圆盘的质量均为 , 圆盘的半径为 ，杆长 ，则此时该系AmRL3统对固定轴 的动量矩大小为（ C ） 。图 4OACByC图 5OBADr AOR图 6AO图 7thrift of excellen

47、t traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has, no awareness to Chi

48、na also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good living of improve and ha

49、rd, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects everyone has accountability. Four, future direction and improvement measures 1, belief and f