LBM vs LBF
LBM thiab LBF yog ob chav siv los ntsuas qhov hnyav thiab quab yuam. LBM stands rau Pound mass thiab LBF sawv rau Pound force. Mass thiab quab yuam yog ob lub ntsiab lus tseem ceeb heev uas tau tham hauv cov tshuab. Cov no yog ob qho tseem ceeb tshaj plaws ntawm lub cev qhov ntau thiab yog cov ntsiab lus intuitive. Nws yog ib qho tseem ceeb kom muaj kev nkag siab zoo hauv cov ntsiab lus no thiab cov chav siv los ntsuas lawv kom ua tau zoo hauv cov haujlwm xws li physics, engineering, motor mechanics thiab ntau ntxiv. Hauv tsab xov xwm no, peb yuav tham txog dab tsi lub zog thiab loj yog dab tsi, LBM thiab LBF yog dab tsi, lawv cov ntsiab lus, kev siv, qhov sib xws ntawm LBM thiab LBF, thiab thaum kawg qhov txawv ntawm LBM thiab LBF.
LBM (Pound Mass)
Yuav kom nkag siab tias LBM yog dab tsi, ib tus yuav tsum nkag siab lub tswv yim ntawm pawg ua ntej. Pawg tau muab faib ua peb hom xws li inertial mass, active gravitational mass thiab passive gravitational mass. Cov ntaub ntawv sim qhia tias tag nrho peb ntawm cov khoom no yog tib yam. Matter thiab zog yog ob hom ntawm pawg. Qhov kev xav tsis zoo yog tias qhov hnyav yog ntsuas hauv kilograms tab sis qhov tseeb, 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 electromagnetic tsis muaj qhov hnyav. Hauv kev sib piv, muaj ob hom huab hwm coj txhais tau tias yog so mass thiab relativistic huab hwm coj. Chav tsev SI rau kev ntsuas qhov hnyav yog kilogram. Chav ntsuas pound yog siv los ntsuas qhov loj hauv qee lub tebchaws. Cov cim lb, lbm, lb myog siv los qhia phaus phaus.1 phaus yuav muab 0.454 kilograms.
LBF (Pound Force)
Yuav kom nkag siab lub tswvyim ntawm LBF, ib tus yuav tsum xub nkag siab lub tswvyim ntawm kev quab yuam. Kev quab yuam yog ib lub tswv yim tseem ceeb heev hauv txhua hom physics. Nyob rau hauv lub ntsiab lus tseem ceeb tshaj plaws, muaj plaub lub zog. Cov no yog lub zog gravitational, lub zog electromagnetic, lub zog tsis muaj zog thiab lub zog muaj zog. Cov no tseem hu ua kev sib cuam tshuam thiab tsis yog kev sib txuas lus. Lub zog niaj hnub peb siv los thawb ib yam khoom lossis ua haujlwm yog kev tiv tauj. Nws yuav tsum tau muab sau tseg tias lub zog ib txwm ua nyob rau hauv khub. Lub zog ntawm cov khoom A ntawm cov khoom B yog sib npaug thiab tawm tsam rau lub zog ntawm cov khoom B ntawm cov khoom A. Qhov no yog hu ua Newton txoj cai thib peb ntawm kev txav. Lub ntsiab txhais ntawm quab yuam yog "muaj peev xwm ua haujlwm". Nws yuav tsum raug sau tseg tias txhawm rau ua haujlwm, yuav tsum muaj lub zog, tab sis txhua lub zog tsis tas yuav ua haujlwm. Txhawm rau siv lub zog, yuav tsum muaj ntau lub zog. Lub Pound force yog qhov hnyav ntawm ib yam khoom vim yog tus qauv gravitational quab yuam. Lub gravitational acceleration yog 32.17 ko taw ib ob ib ob lub Newton tus qauv rau quab yuam muab peb ib tug luj ntawm ib yam khoom los ua (qhov hnyav)acceleration. Ib LBF txhais tau tias yog qhov hnyav ntawm 1 phaus loj.
LBF thiab LBM txawv li cas?
• LBM yog siv los ntsuas qhov hnyav, qhov LBF yog siv los ntsuas lub zog. Txawm li cas los xij, LBF tau txhais rau lub zog gravitational nws tuaj yeem siv los ntsuas txhua lub zog.
• Qhov loj ntawm LBM yog qhov loj, qhov ntev ntawm LBF yog qhov lojntev / sijhawm 2.
