2010双语力学试题a卷及答案(定稿)

《2010双语力学试题a卷及答案(定稿)》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、长江大学试卷学院班级学号姓名…………….…………………………….密………………………………………封………………..…………………..线……………………………………..2010─2011学年第一学期《力学》(双语)课程考试试卷(A卷)专业：物理学年级：09级考试方式:闭卷学分:4.5考试时间：120分钟题号一二三四五六总分得分阅卷人得分Ⅰ.FillingtheBlanks(2´10=20marks)1.Asystemhasanacceleration.Oneoftheforcesactingonthesystemis.Isthisthetotalforceonthesystem?.If

2、not,theotherforceactingonthesystemis2.Theparallelaxistheoremis3.TheNewton’slawofGravitationis4.Body1andbody2areincompletelyinelasticone-dimensionalcollision.Iftheirinitialmomentaarerespectively,theirfinalmomentaisFigure15.Twomasses,and(),hangoveranidealpulleyandthesystemisfreetomove(seeFigure1)

3、.SuchanarrangementiscalledanAtwood’smachine.Themagnitudeoftheaccelerationofthesystemoftwomassesis.ThemagnitudeofthetensioninthecordisA卷第6页共6页6.Ifamanmoves,withaspeedequalto0.5thatofsound,awayfromastationaryorgan(风琴)producingasoundoffrequencyf,hewillprobablyhearasoundoffrequency7.Iftheangularmom

4、entumofthesystemremainsconstant,thenetexternaltorqueactingonasystemis8.Thedistancebetweentheadjacenttwonodesis阅卷人得分Ⅱ．ChoosetheCorrectAnswer(3´10=30marks)1.A0.20kgpuckslidesacrossafrictionlessfloorwithaspeedof10m/s.Thenetworkdoneonthepuckis()A-20JB-10JC0JD20J2.TwoobjectsAandB,asshowninFig.2,both

5、withmassareplacedinsideanelevatorwhoseaccelerationis,themassesoftheropeandthepulleyarenegligible.Ifthefrictionalforcesofthepulleyaxisandthetablearealsonegligible,andtheresistanceoftheaircanbeneglected,thetensionintheropeis()Figure2ABCDA卷第6页共6页3.Themagnitudeoftheforceofgravitybetweentwoidentical

6、objectsisgivenby.Ifthemassofeachobjectisdoubledbutthedistancebetweenthemishalved,thenthenewforceofgravitybetweentheobjectswillbe()A16B4CD84.Apointmassmisundergoinguniformcircularmotionwithanangularfrequencyinahorizontalcircleofradiusr.Whichofthefollowingisarepresentationoftheangularmomentumofth

7、emass?()长江大学试卷学院班级学号姓名…………….…………………………….密………………………………………封………………..…………………..线……………………………………..A.B.C.D.5.Whenamasspointisinacircularmotionthen()AThetangentialaccelerationdefinitelychange,thenormalaccelerationalsochange.BThetangentiala