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1、ConceptualPhysicsLab08p:MySolarSystemTodaywewillplaygodbydesigningourownsolarsystem.StartingtheSimulationEnterhttp://phet.colorado.edu/index.phpinthelocationbarofyourinternetbrowsertoviewthePhysicsEducationTools(PhET)Website.Clickonthe“Playwithsims”buttontoviewthesele

2、ctionofsimulations.Forthisactivity,clickon“Motion”fromthecategorieslistedontheleftsideofthepage.Choosethe“MySolarSystem”simulation.Youcanrunthesimulationeitheronlinebyclickingonthe“RunNow!”buttonorfromyourcomputerbyclickingonthe“RunOffline”buttonanddownloadingit.Notet

3、hesefeaturesofthesimulation:changethemassofeachbody(inrelativeunits)Presetsystemsclocktomeasuretime(inrelativeunits)Takesometimetoplaywiththefeaturesofthesimulation,thendoeachoftheactivitiesbelowandanswerthequestionsthatfollow.1.ChoosetheSunandplanetpresetsystemfromth

4、edrop-downmenuontheupperright.Startthesimulationandobservewhathappens.(a)Inthespacebelow,sketchthepathfollowedbyeachobject.(b)WhydoestheSunmoveandnotjusttheplanet?(c)Whatcausestheplanettomoveinacircularpath?1.Resetthesimulationandincreasethemassoftheplanetfrom10unitst

5、o100units,thenstartthesimulationagainandobservewhathappens.(a)Inthespacebelow,sketchthepathfollowedbyeachobject.(b)Howarethepathsfollowedbyeachobjectdifferentfromthatofquestion1?(c)Whydoeschangingthemassoftheplanetchangethepathsoftheobjects?2.Resetthesimulation,change

6、themassoftheplanetbackto10units,andincreasethemassoftheSunfrom200unitsto800units.Startthesimulationagainandobservewhathappens.(a)Inthespacebelow,sketchthepathfollowedbyeachobject.(b)Howarethepathsfollowedbyeachobjectdifferentfromthatofquestion1?(c)Whydoeschangingthema

7、ssoftheSunchangethepathsoftheobjects?1.ResetthesimulationandchangethemassoftheSunbackto200units.(a)ForeachoftheSunmassesinthechartbelow,usethesimulation’sclocktomeasurehowlongittakesfortheplanettocompleteoneorbit.Thistimeiscalledtheperiodoftheorbit.Recordeachorbitalpe

8、riodinthechart.MassofSunPeriodofPlanetaryOrbit200250300350400450500550600(b)WhatistheeffectofincreasingtheSun’smassontheorbi