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1、万有引力全面总结ThefirstunitoflawofgravityanditsapplicationBasicknowledgeofOne.Kepler，slawofmotion(1)thefirstlawofKepler:allplanetsorbitthesuninanellipse,andthesunisinalltheellipses・(2)Kepler，ssecondlaw:foreveryplanet,thelinebetweenthesunandtheplanetissweptbythesameamountoftime・(3)thethirdlawo
2、fKepler:theorbitsofallplanetsareequaltothoseofthesecondpowerofthecycle・Two.Thelawofgravity1,(1)content,andalltheobjectsareattractedtoeachother,thesizeofthegravitybetweentwoobjects,andtheirqualityisdirectlyproportionaltotheproduct,andisinverselyproportionaltothesquareofthedistanceofthem
3、.(2)theformula:itiscalled・Formula(3)theapplicablecondition:strictlyspeakingisonlyapplicabletoparticleinteractions,whenthedistancebetweentwoobjectsismorethanthesizeoftheobjectitself,theapproximateformulacanalsobeused,butatthemoment,rshouldbethedistancebetweentwoobjectsfocus・Foruniformsp
4、heres,risthedistancebetweentwoheart・ThebasicideaofthelawofheavenlybodiesisdiscussedThebasicmethod:themotionofheavenlybodiesisregardedasuniformcircularmotion,andthecentripetalforceisprovidedbygravity・GravityandgravityGravityisproducedbythegravitation,duetotheearthJsrotation,thusobjectsw
5、iththecentripetalforceisneededwhentheearth，srotationoftheearthJssurface・Gravityis,infact,isacomponentoftheuniversalgravity・Anothercomponentisanobjectwiththecentripetalforceneededfortheearth'srotation,asshowninfigure,duetothechangeoflatitude,centripetalforceFdocircularmotionoftheobjectt
6、otheconstantlychanging,sothesurfacegravitychangesoverthelatitudeoftheobject,namelytheaccelerationofgravitygchangesoverthelatitude,graduallyincreasedfromtheequatortothepoles・Usuallyincalculationforgravityandgravitationweresimilar,andthatbothareequal,name1ym2g二g,g二GM/r2isusedtocalculatet
7、hesizeoftheplanet'ssurfacegravityacceleration,Atthesamelatitudeoftheearth,thegisreducedfromtheheightoftheground,whichisgh二GM/(r+h)2,whichisgh=02•gAttheequator,thegravitationalpulloftheobjectisbrokendownbytwoseparateforces,F,andthem2gisonalineF二F+m2g,Som2gisFofFisequaltoGminusm2Romega
