Video: Puas yog ib yam khoom uas muaj zog ib txwm muaj lub zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ch 8 Xav & Piav cov lus teb:
Yog, ib khoom nrog momentum ib txwm hasenergy . Yog tias khoom muaj zog (mv) nws yuav tsum tau tshem, thiab yog tias nws txav nws muaj kinetic zog . No, ib khoom nrog lub zog ua TSIS TAU ib txwm muajmomentum . Txij li qhov no cov khoom velocity = 0, nws lub zog yog zero.
Tsis tas li ntawd, puas tuaj yeem muaj lub zog tsis muaj lub zog?
Yog lawm, ib yam dab tsi tuaj yeem muaj zog yam tsis muaj muaj lub zog . Momentum yog txhais raws li qhov loj ntawm anobject lub sij hawm nws ceev.
Ib tug kuj yuav nug, lub zog cuam tshuam li cas rau lub zog? Cov lub zog ntawm ib qho yog muab los ntawm qhov sib npaug, P = mv, qhov twg P yog qhov lub zog ntawm qhov particle, mis qhov loj ntawm cov particle, thiab v yog qhov tshaj tawm ntawm cov particle. zog ntawm ob yam khoom muaj tib yam lub zog yog qhov sib piv ntawm lawv pawg.
Yog li ntawd, ib yam khoom puas tuaj yeem muaj lub zog tsis muaj zog tsis muaj lub zog tsis muaj zog piav qhia?
Teb: Momentum yog tus khoom ntawm massand ceev ntawm a cev, za a lub cev loj yeej tsis yog zerobut tshaj tawm ua tau be zero os a lub cev yog so, Yog li yog tias a lub cev yog so nws lub zog yog xoom tab sis yog tias nws yog so ntawm a qhov siab nws muaj peev xwm gravitational zog li no mechanical zog.
Lub zog ntawm ib yam khoom ntawm m yog dab tsi?
Momentum yog lwm qhov kev ntsuas vector. Momentum yog nyob rau hauv tib txoj kev raws li kev tshaj tawm. Cov kws tshawb fawb suav lub zog los ntawm multiply pawg ntawm khoom los ntawm kev ceev ntawm lub khoom . Nws yog anindication ntawm yuav ua li cas nyuaj nws yuav tsum tsis txhob khoom.
Pom zoo:
Puas yog lub zog gravitational zoo ib yam li lub zog muaj peev xwm?
Lub zog muaj peev xwm yog lub zog uas khaws cia rau hauv ib yam khoom lossis khoom siv. Gravitational muaj peev xwm zog yog lub zog nyob rau hauv ib yam khoom uas yog tuav nyob rau hauv ib tug ntsug txoj hauj lwm. Elastic muaj peev xwm lub zog yog lub zog khaws cia hauv cov khoom uas tuaj yeem ncab lossis compressed
Puas yog lub zog gravitational ntawm ob yam khoom txaus nyiam los yog ob qho tib si?
Txij li thaum lub zog gravitational yog inversely proportional rau lub square ntawm kev sib cais nyob deb ntawm ob tug interacting khoom, ntau sib nrug deb yuav ua rau cov tsis muaj zog gravitational zog. Yog li thaum ob yam khoom sib cais los ntawm ib leeg, lub zog ntawm gravitational attraction ntawm lawv kuj txo
Dab tsi yog qhov txawv ntawm lub zog siv zog thiab lub zog thauj khoom?
Raws li nrog cov dav hlau inclined, cov khoom yuav tsum tau txav mus los yog lub zog muaj zog los yog thauj khoom thiab kev siv zog yog lub zog muab tso rau hauv kev txav mus los ntawm lwm qhov kawg ntawm lub fulcrum
Puas yog lub zog hauv daim ntawv ntawm kev txav yog lub zog muaj peev xwm?
Lub zog nyob rau hauv daim ntawv ntawm kev txav yog 'muaj peev xwm' zog. Qhov ntau dua 'mas' ib qho khoom txav muaj, lub zog kinetic nws muaj. Lub pob zeb ntawm ntug pob tsuas muaj 'kinetic' zog vim nws txoj hauj lwm. 'Thermal' zog yog lub zog khaws cia los ntawm cov khoom uas ncab los yog compression
Puas yog kev ua haujlwm lub zog theorem ib txwm muaj tseeb?
Lub hauv paus ntsiab lus ntawm kev ua haujlwm-zog siv tau txawm hais tias muaj ib qho kev tsis sib haum xeeb. Tsuav koj siv cov haujlwm ua los ntawm lub zog tshwm sim (thiab lub sijhawm tshwm sim thaum koom nrog lub cev nruj) hauv qhov sib npaug (lossis sib npaug ntxiv cov haujlwm ua los ntawm txhua lub zog / lub sijhawm), lub zog ua haujlwm yog siv tau