华工《大学物理》2011-2012(2)试卷_(b卷)答案

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1、姓名学号学院专业座位号(密封线内不答题)……………………………………………………密………………………………………………封………………………………………线……………………………………线………………………………………_____________________…诚信应考,考试作弊将带来严重后果！华南理工大学期末考试《大学物理》2011-2012(2)期末试卷（B卷）注意事项：1.考前请将密封线内各项信息填写清楚；2.所有答案请直接答在答题纸上；3．考试形式：闭卷；4.本试卷共15题，满分100分，考试时间120分钟。考试时间：2012年7月2日9：00-----11：

2、00题号12345678得分评卷人题号9101112131415总分得分评卷人ⅠCompletion(Total40points,4points/question)1.Aparticleleavestheoriginwithaninitialvelocityandaconstantacceleration.Whenitreachesitsmaximumcoordinate,itsvelocityis.2.Aforceactsonaparticleastheparticlemovesalonganaxis,withinnewtons,inmeters,andaco

3、nstant.At,theparticle’skineticenergyis20.0J;at,itis11.0J.Find4.00N/m.3.Thefigureshowsaparticlemovinginahorizontalcircle.Aforceactsontheparticle.Duringtheparticlemovingfrompointto(0，2R),theworkdonebyis.4.A4.0kgbundlestartsupa30oinclinewith128Jofkineticenergy.Ifthecoefficientofkineticf

4、rictionbetweenbundleandinclineis0.30,itwillslideuptheincline4.3m.《大学物理》2011-2012(2)期末试卷（B卷）第9页共9页5.Theangularaccelerationofawheelis,withinradianspersecond-squaredandinseconds.Attime,thewheelhasanangularvelocityofandanangularpositionof.Writeexpressionsfor(a)theangularvelocity(rad/s);(

5、b)theangularposition(rad).Fig.B-2Fig.B-2Fig.B-26.Anironanchorofdensity7870kg/m3appears200Nlighterinwaterthaninair.Thevolumeoftheanchoris.Itsweightintheairis.7.Inthefigure,twodiversespringsofspringconstantrespectivelyandareinseriesattachedtoablockofmass,thefrequencyofoscillationis.8.A

6、stationarymotiondetectorsendssoundwavesoffrequency0.150MHztowardatruckapproachingataspeedof45.0m/s.Thefrequencyofthewavesreflectedbacktothedetectoris0.195MHz.pVadbc9.Thefigurerepresentsaclosedcycleforagas(thefigureisnotdrawntoscale).Thechangeintheinternalenergyofthegasasitmovesfromat

7、ocalongthepathabcis-200J.Asitmovesfromctod,180Jmustbetransferredtoitasheat.Anadditionaltransferof80Jtoitasheatisneededasitmovesfromdtoa.Asitmovesfromctod,theworkdoneonthegasis60J.10.ThefigureshowstheMaxwell-Boltzmannvelocitydistributionfunctionsofagasfortwodifferenttemperaturesand,th

8、en<(<,>,or=)