constant velocity and uniform acceleration等速和等加速度

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1、ConstantVelocityandUniformAcceleration1.BillisontheroofoftheCircleK,anddropsastone5.0mabovethesurfaceoftheparkinglot.Tedisintheparkinglot,andthrowsastoneupwardat8.0m/s,releasingit2.0mabovethesurfaceoftheparkinglot.Writepositionvstimeequationsofmotionforeachstone,afterthestonesarereleased.2.S

2、ketchqualitativepositionversustime,velocityversustime,andaccelerationversustimegraphsforthemotionofthetwostonesinthepreviousproblem.TeacherExcellenceWorkshopSeries3PeggyBertrandConstantVelocityandUniformAcceleration1.Achildridesabicyclebackandforthinfrontofherhouse.Shepedals10meterstotheeast

3、in10seconds,turnsthebicyclearoundin5seconds,andthenpedals12meterstothewestin15seconds.Drawpositionversustimeandvelocityversustimegraphsofhereast-westmotion.TeacherExcellenceWorkshopSeries3PeggyBertrandConstantVelocityandUniformAcceleration2006B2(15points)Aworld-classrunnercancompletea100mdas

4、hinabout10s.Paststudieshaveshownthatrunnersinsucharaceaccelerateuniformlyforatimetuandthenrunatconstantspeedfortheremainderoftherace.Aworld-classrunnerisvisitingyourphysicsclass.Youaretodevelopaprocedurethatwillallowyoutodeterminetheuniformaccelerationauandanapproximatevalueoftufortherunneri

5、na100mdash.Bynecessityyourexperimentwillbedoneonastraighttrackandincludeyourwholeclassofelevenstudents.(a)Bycheckingthelinenexttoeachappropriateiteminthelistbelow,selecttheequipment,otherthantherunnerandthetrack,thatyourclasswillneedtodotheexperiment._____Stopwatches_____Tapemeasures_____Rul

6、ers_____Maskingtape_____Metersticks_____Starter’spistol_____String_____Chalk(b)Outlinetheprocedurethatyouwouldusetodetermineauandtu,includingalabeleddiagramoftheexperimentalsetup.Usesymbolstoidentifycarefullywhatmeasurementsyouwouldmakeandincludeinyourprocedurehowyouwoulduseeachpieceoftheequ

7、ipmentyoucheckedinpart(a).(c)Outlinetheprocessofdataanalysis,includinghowyouwillidentifytheportionoftheracethathasuniformacceleration,andhowyouwouldcalculatetheuniformacceleration.TeacherExcellenceWorkshopSeries3PeggyBertrand