Inertia vs Mass
Mass thiab inertia yog ob lub ntsiab lus sib tham hauv kev kho tshuab, hauv physics. Cov ntsiab lus ntawm huab hwm coj thiab inertia yog dav siv nyob rau hauv yuav luag txhua qhov chaw uas muaj txawm tias me ntsis kev siv physics. Mass yog ib qho uas tsis yog-intuitive lub cev muaj nuj nqis ntawm ib yam khoom; inertia kuj yog ib lub tswvyim. Nws yog ib qho tseem ceeb kom muaj kev nkag siab zoo hauv cov ntsiab lus ntawm huab hwm coj thiab inertia kom ua tau zoo hauv thaj chaw xws li mechanics, relativity thiab lwm yam. Nyob rau hauv tsab xov xwm no, peb yuav tham txog dab tsi loj thiab inertia yog, lawv cov ntsiab lus, zoo sib xws, kev siv, thiab thaum kawg qhov sib txawv ntawm huab hwm coj thiab inertia.
mass
Mass tau muab faib ua peb hom sib txawv xws li inertial mass, nquag gravitational mass thiab passive gravitational mass. Kev sim cov ntaub ntawv qhia tau hais tias tag nrho peb ntawm cov khoom no yog tib yam. Matter thiab zog yog ob hom ntawm pawg. Qhov hnyav yog ntsuas hauv kilograms. Qhov kev xav tsis zoo yog qhov hnyav yog ntsuas hauv kilograms, tab sis qhov hnyav yog ntsuas hauv Newton. Qhov hnyav yog tus nqi ntawm lub zog ua haujlwm ntawm qhov loj. Lub zog kinetic ntawm lub cev, lub zog ntawm lub cev, thiab tus nqi ntawm kev nrawm vim yog lub zog siv yog nyob ntawm qhov loj ntawm lub cev. Sib nrug los ntawm cov khoom siv niaj hnub, tej yam xws li hluav taws xob nthwv dej kuj muaj qhov loj.
Nyob rau hauv kev sib piv, muaj ob hom huab hwm coj txhais tau tias yog so mass thiab relativistic mass. Qhov loj ntawm ib yam khoom tsis nyob twj ywm nyob rau hauv ib qho kev txav. Cov khoom seem yog qhov hnyav ntsuas thaum qhov khoom so. Qhov loj ntawm relativistic yog ntsuas rau ib qho khoom txav. Ob qho no yuav luag zoo ib yam rau kev nrawm dua li qhov ceev ntawm lub teeb, tab sis nws txawv heev thaum qhov ceev mus txog qhov ceev ntawm lub teeb. Tus so ntawm lub electromagnetic tsis yog xoom.
Inertia
Inertia yog muab los ntawm lo lus Latin "iners", uas txhais tau tias tsis ua haujlwm lossis tub nkees. Inertia yog ib qho kev ntsuas ntawm qhov ua tub sab ntawm lub cev. Inertia ntawm lub system qhia peb tias nws nyuaj npaum li cas los hloov lub xeev tam sim no ntawm lub system. Qhov siab dua qhov inertia ntawm lub system nyuaj dua nws yog hloov qhov nrawm, nrawm, kev taw qhia ntawm qhov system. Cov khoom uas muaj ntau dua muaj inertia ntau dua. Yog vim li cas lawv thiaj li nyuaj txav mus los. Muab hais tias nws nyob ntawm qhov chaw tsis muaj kev sib txhuam, ib qho khoom txav siab dua yuav nyuaj rau nres ib yam nkaus. Newton thawj txoj cai muab lub tswv yim zoo heev txog inertia ntawm lub cev. Nws hais tias "ib yam khoom tsis raug rau ib qho net sab nraud quab yuam txav ntawm qhov nrawm nrawm". Qhov no qhia peb tias cov cuab yeej ntawm ib yam khoom tsis hloov tshwj tsis yog tias muaj lub zog sab nraud ua rau nws.
Ib yam khoom thaum so tuaj yeem suav tau tias yog ib qho khoom muaj qhov nrawm nrawm. Hauv kev sib piv, qhov inertia ntawm ib yam khoom nyhav rau infinity thaum qhov ceev ntawm qhov khoom mus txog qhov ceev ntawm lub teeb. Li no ib tug infinite quab yuam yuav tsum tau nce lub tam sim no tshaj tawm. Nws tuaj yeem ua pov thawj tias tsis muaj huab hwm coj mus txog qhov nrawm ntawm lub teeb.
Qhov txawv ntawm Mass thiab Inertia yog dab tsi?
• Pawg yog qhov ntsuas tau, qhov inertia yog ib lub tswv yim siv los piav qhia tias nws nyuaj npaum li cas los hloov lub xeev tam sim no ntawm pawg.
• Rau classical mechanics, huab hwm coj yog ib yam khoom ntawm cov khoom nws tus kheej tab sis inertia yog cov cuab yeej ntawm cov lus tsa suab thiab cov huab hwm coj.
• Inertia yog lub tswvyim, uas yog siv los txhais cov pawg.
