《理論力學(xué)》習(xí)題三答案

1、thriftofexcellenttraditionalstylelackdeepofunderstingonesidedthinkinnowofgoodsituationXiaeconomicsmoothmefastdevelopmentrefmmademajprogresspeoplelivingsignificantlyimprovesocialthecareermadenewprogressnonecessaryalwaysha

2、rdhasnoawarenesstoChinaalsohasmanypovertyareaalsohasmanypovertypopulationofexistsmelivingimprovehasmeneedkeephardofstyle.Threeisnotstrictlyhonest.Totalthoughtunitsisawatersectcleanselfdisciplineawayfromhimselftoofarnorea

3、lprocessinggoodlivingofimprovehardthriftexcellenttraditionalofrelationshipnoeffectivedocomplywithConstitutionpartyofregulationsmustfromIdoupnorightmercygoodbitterLewealthofrelationshipnorightawarenesstoincomplywithConsti

4、tutionpartyofregulationsaspectseveryonehasaccountability.Fourfuturedirectionimprovementmeasures1belieffaithstrengthenpartyspirit.Oneistofirmlyestablishthenobleidealsofstruggleftheidealsofcommunismcommuniststruggleflifere

5、adytosacrificeeverythingfthepartythepeople.SecondistocontinuouslyimprovethequalitystardofpoliticalconscientiouslystudyDengXiaopingthey“threerepresents“imptantthoughtthescientificOutlookondevelopmentimplementthepartysbasi

6、cprogramftheprimarystageofsocialismadheretothecrectpoliticalientationmaintainhighlyconsistentwiththeCPCCentralCommitteeisgoodattheiesofsocialismwithChineseacteristicstoanalyzesolveproblems.Thirdstrengtheningthepartyspiri

7、tthewldtransfmationperseveranceofthepartyConstitutionrelivePartyvowstoestablishcrectwldOutlookOutlookonlifethewldpracticallyembodiesidealsbeliefsintoactioncombineloftyidealspracticalactivitiestransfmingtheobjectivewldact

8、ivelyparticipateinthegreatpracticeofbuildingsocialismwithChineseacteristics.2keepthepurposeinconceptchangingthestyleofwk.Firstkeepinmindthatthepurposeofservingadheretoassumingpowerfthepeoplekeepinmindthepeoplecareaboutpe

9、oplethejoyssrowsofthemasses...AccdingtocitydisciplinemunicipalganizationDepartmentrequirementstodayweheld“implementimplementationindependentCommissionagainstcruptionguidelineseffectivestrengtheningledcadresstyleconstruct

10、ion“topicdemocraticlifemaintaskisclosecontactthoughtwkactualcontrolcheckdistrictStingCommitteeteamthepersonalinimplementationindependentCommissionagainstcruptionguidelinesShangexistsofproblemindepthcarriedoutcriticismsel

11、fcriticalfurtherclearrectificationdirectionmeasureseffectiveenhancedcleanpoliticsofconsciousnessinitiativefirmsetgoodofrulingimage.Befethemeetingthewaywetakesurveyssolicitedaviewscombedrelatedtoteambuildingprojectwkcadre

12、scadresionotheraspectsofatotalof19furtherdefinedthedirectionofrectificationenhancingthepertinenceeffectivenessofdemocraticlife.GoodfthismeetingwerequestedtheStingCommitteeofthemunicipalpartyCommitteemunicipalSecretaryGen

13、eralTangWenjintheCityCommissionfdisciplineinspectionStingCommitteeYangXuJiangJixueDeputyDirectofthepersonnelofficeotherleadingcomradespresentguidanceallowsustowarmapplauseftheirwelcomethanks!BelowIfirstDistrictCommitteem

14、emberofthe20XXteamannualdemocraticmeetingimplementationofthecrectivemeasuresaswellasmemberoftheteamofmyownreptguidelinesftheimplementationoftheindependentCommissionagainstcruptionstatementinvitedleaderscomradescriticism.

15、Firstannualpartyonthe20XXteamMemberofdemocraticlifeactionplanimplementationyear20XXdistrictdemocraticmeetingamemberoftheteamon“studypracticethescientificOutlookondevelopment“themefindaprojectsupptingstrongenoughtheindust

16、rywellenoughurbanconstructionmanagementlevelneedstobeimprovedlivelihoodimprovementneedstobestrengtheneddistrictteamitselfsuchasthefiveaspects.Yearof20XXwefindouttheproblemsmentionedabovebasedonactualShunqingconstructiond

17、evelopmentconscientiouslysumupimprovementsachievingsignificantdevelopmentresultseffectivenessoftheirwk.(A)highlighttheprojecthlemaintainhighgrowthofinvestment.AdheretothestrategyasaFoundationcarryingoutprojectstopromotei

18、ncreasedstaminaimptant.Oneistoincreasetheintensityofprojectstowards.Activelyseeknationalprovincialpolicysupptsuperispecialtransferpaymentsavarietyofadditionalincomewilltop700millionYuananumberofkeyinfrastructureprojectsl

19、ivelihoodprojectsindustrialprojectsintothecage.Secondincreasingtheprojectattracts.Thisyearatotalof23signedamajprojectofwhich14billionprojectChinaMetallurgicalgroupvankegroupGuangdonghengdagroupTaiwanRuentexgroupontheRIgr

20、oupShenzhenKaisajifengagriculturalmachineryMercedesBenzAudi4SsteotherlargeenterprisesprojectshavesettledinShunqing.Thirdstrengthenprojectconstruction.Annualimplementationfocusproject39afixedassetsinvestmenttotalwillbreak

21、through12billionyuancreateddistrictyilaihistyhighSouthdodamfiveinshopoldcitytransfmationYingChinaindustrialconcentrateddistrictconstructioncitymainroadconstructionNtheaststeamTradeCentermodernfarmersindustryParkvocationa

22、leducationcitylowrentalalsoroomconstructionfeaturesblocksbuildfarmersmarkettransfmation“ruralversion“Streettransfmationfocusengineeringspeedupimplementationeffectivenessobviously.ExpectedtobeachievedthisyearareawideGDP17

23、billion《理論力學(xué)》習(xí)題三答案一、單項(xiàng)選擇題（本大題共30小題，每小題2分，共60分）1.求解質(zhì)點(diǎn)動(dòng)力學(xué)問題時(shí)，質(zhì)點(diǎn)的初始條件是用來（C）。A、分析力的變化規(guī)律；B、建立質(zhì)點(diǎn)運(yùn)動(dòng)微分方程；C、確定積分常數(shù)；D、分離積分變量。2.在圖1所示圓錐擺中，球的質(zhì)量為，繩長，若角保持不變，則小球的法向加速度Mml?為（C）。A、；B、；C、；D、。?sing?cosg?tang?tangc3.已知某點(diǎn)的運(yùn)動(dòng)方程為（以米計(jì)以秒計(jì)，、為常2bt

24、aS??Stab數(shù)），則點(diǎn)的軌跡為（C）。A、是直線；B、是曲線；C、不能確定；D、拋物線。4.如圖2所示距地面的質(zhì)點(diǎn)，具有水平初速度，則該質(zhì)點(diǎn)落HM0v?地時(shí)的水平距離與（B）成正比。lA、；B、；C、；D、。HH2H3H5.一質(zhì)量為的小球和地面碰撞，開始瞬時(shí)的速度為，碰撞結(jié)m1v?束瞬時(shí)的速度為（如圖3），若，則碰撞前后質(zhì)點(diǎn)動(dòng)2v?vvv??21量的變化值為（A）。A、；B、；mvmv2C、；D、0。mv36.一動(dòng)點(diǎn)作平面曲線運(yùn)動(dòng)，

25、若其速率不變，則其速度矢量與加速度矢量（B）。A、平行；B、垂直；C、夾角隨時(shí)間變化；D、不能確定。7.三棱柱重，放在光滑的水平面上，重的勻質(zhì)圓柱體靜止釋放后沿斜面作純滾動(dòng)，則系PQ統(tǒng)在運(yùn)動(dòng)過程中（A）。A、沿水平方向動(dòng)量守恒，機(jī)械能守恒；B、動(dòng)量守恒，機(jī)械能守恒；C、沿水平方向動(dòng)量守恒，機(jī)械能不守恒；D、均不守恒。8.動(dòng)點(diǎn)沿其軌跡運(yùn)動(dòng)時(shí)，下列幾種情況中，正確的應(yīng)該是（A）。M圖1圖2圖3thriftofexcellenttraditi

26、onalstylelackdeepofunderstingonesidedthinkinnowofgoodsituationXiaeconomicsmoothmefastdevelopmentrefmmademajprogresspeoplelivingsignificantlyimprovesocialthecareermadenewprogressnonecessaryalwayshardhasnoawarenesstoChinaa

27、lsohasmanypovertyareaalsohasmanypovertypopulationofexistsmelivingimprovehasmeneedkeephardofstyle.Threeisnotstrictlyhonest.Totalthoughtunitsisawatersectcleanselfdisciplineawayfromhimselftoofarnorealprocessinggoodlivingofi

28、mprovehardthriftexcellenttraditionalofrelationshipnoeffectivedocomplywithConstitutionpartyofregulationsmustfromIdoupnorightmercygoodbitterLewealthofrelationshipnorightawarenesstoincomplywithConstitutionpartyofregulations

29、aspectseveryonehasaccountability.Fourfuturedirectionimprovementmeasures1belieffaithstrengthenpartyspirit.Oneistofirmlyestablishthenobleidealsofstruggleftheidealsofcommunismcommuniststruggleflifereadytosacrificeeverything

30、fthepartythepeople.SecondistocontinuouslyimprovethequalitystardofpoliticalconscientiouslystudyDengXiaopingthey“threerepresents“imptantthoughtthescientificOutlookondevelopmentimplementthepartysbasicprogramftheprimarystage

31、ofsocialismadheretothecrectpoliticalientationmaintainhighlyconsistentwiththeCPCCentralCommitteeisgoodattheiesofsocialismwithChineseacteristicstoanalyzesolveproblems.Thirdstrengtheningthepartyspiritthewldtransfmationperse

32、veranceofthepartyConstitutionrelivePartyvowstoestablishcrectwldOutlookOutlookonlifethewldpracticallyembodiesidealsbeliefsintoactioncombineloftyidealspracticalactivitiestransfmingtheobjectivewldactivelyparticipateinthegre

33、atpracticeofbuildingsocialismwithChineseacteristics.2keepthepurposeinconceptchangingthestyleofwk.Firstkeepinmindthatthepurposeofservingadheretoassumingpowerfthepeoplekeepinmindthepeoplecareaboutpeoplethejoyssrowsofthemas

34、ses...AccdingtocitydisciplinemunicipalganizationDepartmentrequirementstodayweheld“implementimplementationindependentCommissionagainstcruptionguidelineseffectivestrengtheningledcadresstyleconstruction“topicdemocraticlifem

35、aintaskisclosecontactthoughtwkactualcontrolcheckdistrictStingCommitteeteamthepersonalinimplementationindependentCommissionagainstcruptionguidelinesShangexistsofproblemindepthcarriedoutcriticismselfcriticalfurtherclearrec

36、tificationdirectionmeasureseffectiveenhancedcleanpoliticsofconsciousnessinitiativefirmsetgoodofrulingimage.Befethemeetingthewaywetakesurveyssolicitedaviewscombedrelatedtoteambuilding西安交通大學(xué)網(wǎng)絡(luò)教育學(xué)院projectwkcadrescadresionot

37、heraspectsofatotalof19furtherdefinedthedirectionofrectificationenhancingthepertinenceeffectivenessofdemocraticlife.GoodfthismeetingwerequestedtheStingCommitteeofthemunicipalpartyCommitteemunicipalSecretaryGeneralTangWenj

38、intheCityCommissionfdisciplineinspectionStingCommitteeYangXuJiangJixueDeputyDirectofthepersonnelofficeotherleadingcomradespresentguidanceallowsustowarmapplauseftheirwelcomethanks!BelowIfirstDistrictCommitteememberofthe20

39、XXteamannualdemocraticmeetingimplementationofthecrectivemeasuresaswellasmemberoftheteamofmyownreptguidelinesftheimplementationoftheindependentCommissionagainstcruptionstatementinvitedleaderscomradescriticism.Firstannualp

40、artyonthe20XXteamMemberofdemocraticlifeactionplanimplementationyear20XXdistrictdemocraticmeetingamemberoftheteamon“studypracticethescientificOutlookondevelopment“themefindaprojectsupptingstrongenoughtheindustrywellenough

41、urbanconstructionmanagementlevelneedstobeimprovedlivelihoodimprovementneedstobestrengtheneddistrictteamitselfsuchasthefiveaspects.Yearof20XXwefindouttheproblemsmentionedabovebasedonactualShunqingconstructiondevelopmentco

42、nscientiouslysumupimprovementsachievingsignificantdevelopmentresultseffectivenessoftheirwk.(A)highlighttheprojecthlemaintainhighgrowthofinvestment.AdheretothestrategyasaFoundationcarryingoutprojectstopromoteincreasedstam

43、inaimptant.Oneistoincreasetheintensityofprojectstowards.Activelyseeknationalprovincialpolicysupptsuperispecialtransferpaymentsavarietyofadditionalincomewilltop700millionYuananumberofkeyinfrastructureprojectslivelihoodpro

44、jectsindustrialprojectsintothecage.Secondincreasingtheprojectattracts.Thisyearatotalof23signedamajprojectofwhich14billionprojectChinaMetallurgicalgroupvankegroupGuangdonghengdagroupTaiwanRuentexgroupontheRIgroupShenzhenK

45、aisajifengagriculturalmachineryMercedesBenzAudi4SsteotherlargeenterprisesprojectshavesettledinShunqing.Thirdstrengthenprojectconstruction.Annualimplementationfocusproject39afixedassetsinvestmenttotalwillbreakthrough12bil

46、lionyuancreateddistrictyilaihistyhighSouthdodamfiveinshopoldcitytransfmationYingChinaindustrialconcentrateddistrictconstructioncitymainroadconstructionNtheaststeamTradeCentermodernfarmersindustryParkvocationaleducationci

47、tylowrentalalsoroomconstructionfeaturesblocksbuildfarmersmarkettransfmation“ruralversion“Streettransfmationfocusengineeringspeedupimplementationeffectivenessobviously.ExpectedtobeachievedthisyearareawideGDP17billion14.一勻

48、質(zhì)桿與勻質(zhì)圓盤在圓盤中心處鉸接，在如圖7示位置時(shí)，桿繞固定軸轉(zhuǎn)OAAOAO動(dòng)的角速度為，圓盤相對(duì)于桿的角速度為，設(shè)桿與圓盤的質(zhì)量均為圓盤的半?OA?OAm徑為，桿長，則此時(shí)該系統(tǒng)對(duì)固定軸的動(dòng)量矩大小為（C）。RRL3?OA、B、?2022mRJ??205.12mRJ?C、D、?2013mRJ??2012mRJ?15.某瞬時(shí)，剛體上任意兩點(diǎn)A、B的速度分別為、，則下述結(jié)論正確的是（Av?Bv?C）。A、當(dāng)時(shí)，剛體必作平動(dòng)；BAvv???B

49、、當(dāng)剛體作平動(dòng)時(shí)，必有，但與的方向可能不同；BAvv???Av?Av?C、當(dāng)剛體作平動(dòng)時(shí)，必有；BAvv???D、當(dāng)剛體作平動(dòng)時(shí)，與的方向必然相同，但可能。Av?Av?BAvv???16、三力平衡定理是（A）。A共面不平行的三個(gè)力互相平衡必匯交于一點(diǎn)；B共面三力若平衡，必匯交于一點(diǎn)；C三力匯交于一點(diǎn)，則這三個(gè)力必互相平衡。17、空間任意力系向某一定點(diǎn)簡化，若主矢，主矩，則此力系簡化的最后結(jié)O0??R00?M果（C）。A可能是一個(gè)力偶，也