Qhov sib txawv tseem ceeb ntawm Newton thiab joule yog Newton yog ib chav ntsuas quab yuam, thaum Joule yog ib chav ntsuas lub zog.
Joule thiab Newton yog ob chav uas muaj txiaj ntsig zoo hauv SI unit system. Cov chav no tseem ceeb heev, thiab kev nkag siab zoo ntawm lawv yog qhov tsim nyog. Qhov sib txawv ntawm Newton thiab Joule yog lawv daim ntawv thov.
Newton yog dab tsi?
Yuav kom nkag siab tias Newton yog dab tsi, ib tus yuav tsum xub nkag siab txog lub tswv yim ntawm lub zog thiab lub zog tawm. Qhov linear momentum ntawm ib yam khoom yog sib npaug rau qhov loj ntawm cov khoom sib npaug los ntawm qhov nrawm ntawm qhov khoom. Txij li cov huab hwm coj yog scalar, thiab qhov tshaj tawm yog vector, linear momentum kuj yog vector, uas muaj tib txoj kev raws li qhov tshaj tawm. Raws li Newton txoj cai lij choj thib ob ntawm kev txav mus los, net force ua rau ntawm ib qho khoom yog proportional rau tus nqi ntawm kev hloov ntawm linear momentum ntawm cov khoom ntawd. Yog li ntawd, Net quab yuam=tas li X lub sijhawm hloov pauv / sijhawm
Force muaj cov ntsiab lus hauv kg m/s 2 Txhawm rau tshem tawm qhov kev faib ua feem tsis tu ncua, Newton txhais tau tias yog lub zog xav tau los hloov qhov nrawm ntawm ib qho khoom nrog qhov loj ntawm 1 kilogram, los ntawm 1 meter ib ob, hauv 1 vib nas this. (piv txwv li accelerating ib yam khoom nrog unit loj, los ntawm ib chav tsev tshaj tawm, ntawm chav tsev lub sij hawm).
Daim duab 01: Ib Newton
Lub tsev Newton tau txais nws lub npe tom qab tus kws tshawb fawb tseem ceeb Sir. Isaac Newton. Peb siv nws los ntsuas lub zog. Qhov ntev ntawm lub zog yog [ntau] [ntev] / [lub sij hawm] ^2.
YJoule yog dab tsi?
Yuav kom nkag siab tias Joule yog dab tsi, kev nkag siab zoo ntawm cov ntsiab lus ntawm lub zog thiab kev ua haujlwm yog qhov tsim nyog. Lub zog yog lub tswv yim tsis muaj kev xav. Lo lus "zog" los ntawm Greek lo lus "energeia", uas txhais tau hais tias kev ua haujlwm lossis kev ua haujlwm. Hauv qhov kev nkag siab no, lub zog yog lub tshuab ua haujlwm tom qab. Lub zog tsis yog ib qho kev soj ntsuam ncaj qha. Tab sis peb tuaj yeem suav nws los ntawm kev ntsuas cov khoom sab nraud. Lub zog tuaj yeem tshwm sim hauv ntau hom. Kinetic zog, thermal zog thiab lub zog muaj peev xwm yog rau npe ob peb. Ntxiv mus, peb tuaj yeem muab lub zog rau lub kaw lus hauv ntau txoj hauv kev; los ntawm kev ua haujlwm ntawm lub kaw lus lossis ncaj qha raws li lub zog hloov pauv xws li cua sov lub system.
Piv txwv li, xav txog qhov hnyav ntawm m kg ntawm qhov chaw tsis muaj kev sib txhuam, kab rov tav saum npoo yog muab lub net force F hla qhov deb x. Thawj lub zog kinetic ntawm lub cev yog xoom thiab xav tias qhov khoom siv lub nrawm v tom qab qhov kev ncua deb x qhov kawg ntawm lub zog yog (mv2)/2. Txij li thaum F=d(mv)/dt, los ntawm kev sib koom ua ke ntawm ob tog nrog kev hwm rau dx, peb tuaj yeem tau txais qhov txiaj ntsig F.x=(mv2)/2. Ntxiv mus, peb tuaj yeem ua pov thawj tias txoj haujlwm ua tiav (piv txwv li: lub zog xa mus) yog F.x. Txij li thaum peb muab cov khoom dot, lub zog tshwm sim yog qhov ntsuas.
Peb tuaj yeem txhais lub tsev Joule raws li tus nqi ntawm lub zog xa mus thaum lub zog ntawm 1 Newton siv rau ntawm ib qho khoom ntev li 1 meter. Chav tsev hauv paus ntawm Joule yog kg m2/s2 Qhov ntev ntawm Joule yog [mass][length]2 /[time]2 Lub tsev Joule muaj npe rau kev hwm ntawm tus kws tshawb fawb nto moo James Prescott Joule.
Qhov txawv ntawm Newton thiab Joule yog dab tsi?
Lub zog tsim nyog los muab qhov hnyav ntawm ib kilogram nrog kev nrawm ntawm ib meter ib ob yog Newton, thiab joule yog tus nqi ntawm lub zog xa mus thaum lub zog ntawm 1 Newton yog siv rau ntawm ib qho khoom ntev. ntawm 1 meter. Qhov sib txawv tseem ceeb ntawm Newton thiab joule yog tias chav tsev Newton ntsuas lub zog thaum lub tsev joule ntsuas lub zog. Peb denote Newton li N thiab joule li J. Ntxiv mus, Newton yog ib tug vector thiab joule yog ib tug scalar. Nov yog lwm qhov sib txawv tseem ceeb ntawm Newton thiab Joule.
Summary – Newton vs Joule
Newton thiab joule yog cov chav tseem ceeb hauv SI unit system. Qhov sib txawv tseem ceeb ntawm Newton thiab joule yog Newton yog ib chav ntsuas lub zog, thaum Joule yog ib chav ntsuas lub zog.
