高一物理牛顿第二定律课件

《高一物理牛顿第二定律课件》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、Newton'sfirstlawOneday,StephenSuwasdrivingamotorcycleonthestreet.Meanwhile,DavidSunwasdrivingatrunkatafastspeed.StephenSudidnotstopintimeassoonasthetrafficlightturnedred.DavidsuncouldnotcontrolthevanandcollidedwithStephen.Theremainingquestionis,eventh

2、oughStephenslammedonthebrake,theaccidenthappenedanyway.Whatcausedthistragedy??casestudytendencyresistinertiamotionabsencewordlistAccordingtoNewton'sfirstlaw,anobjectinmotioncontinuesinmotionwiththesamespeedandinthesamedirectionunlessacteduponbyanunbal

3、ancedforce.inertiaDefinitionNewton’sfirstlawofmotion牛顿第一定律:EverybodycontinuesinitsstateofuniformmotionorrestunlessacteduponbyanexternalforceApplicationoftheNewton’sfirstlawSafetybeltsAnypassengersinthecarwillalsobedecceleratedtorestiftheyarestrappedto

4、thecarbyseatbelts.Beingstrappedtightlytothecar,thepassengerssharethesamestateofmotionasthecar.Asthecaraccelerates,thepassengersacceleratewithit;asthecardecelerates,thepassengersdeceleratewithit;andasthecarmaintainsaconstantspeed,thepassengersmaintaina

5、constantspeedaswell.practiceIftwoobjects,auniformdiskandauniformsphere,havethesamemomentofinertiaabouttheiraxesofrotationandthesameangularvelocity,thenthediskhasthelargerrotationalkineticenergy.(T)   True(F)   FalseIftwoendsofaropearepulledwithforces

6、ofequalmagnitudeandoppositedirection,thetensionatthecenteroftheropemustbezeroTrueFalseAdiskandahoopofthesamemassMandradiusRrollwithoutslippingacrossahorizontalfloor.Boththediskandthehooparemovingwithvelocityvwhenthefloorstartstoslopeupward.Whichstatem

7、entiscorrect?(B)(a)   Thediscmakesittoagreaterheightthanthehoop.(b)   Thehoopmakesittoagreaterheightthanthedisk.(c)   Boththediskandthehoopmakeittothesameheight.Newton'sSecondLawNewton'sSecondLawofmotionpertainstothebehaviorofobjectsforwhichallexist

8、ingforcesarenotbalanced.Thesecondlawstatesthattheaccelerationofanobjectisdependentupontwovariables-thenetforceactingupontheobjectandthemassoftheobject.Theaccelerationofanobjectdependsdirectlyuponthenetforceactingupontheobject,andinverselyupont