Video: U txhais li cas hauv physics tshaj tawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
u yog pib ceev hauv m/s. t yog time ins. Piv txwv li, lub tsheb nrawm hauv 5 s ntawm 25 m / s txog 3 5 m / s. Nws ceev hloov los ntawm 35 - 25 = 10 m / s.
Xav txog qhov no, U txhais li cas hauv kev tshaj tawm?
Ceev ceev yog txhais raws li vector ntsuas ntawm tus nqi thiab kev taw qhia ntawm kev txav. Muab tso yooj yim, velocity yog ceev ntawm ib yam dab tsi txav mus rau hauv ib qho kev taw qhia, xws li kev ceev ntawm lub tsheb mus rau sab qaum teb ntawm txoj kev loj, los yog ceev lub foob pob hluav taws mus rau hauv qhov chaw.
Qhov thib ob, dab tsi yog qhov nrawm hauv physics nrog piv txwv? Rau piv txwv , "5 meters ib ob" yog ib tug scalar, whereas "5 meters ib ob sab hnub tuaj" yog ib tug vector. Yog tias muaj kev hloov pauv hauv ceev , kev taw qhia lossis ob qho tib si, ces cov khoom muaj hloov pauv ceev thiab tau hais tias tab tom ua kom nrawm nrawm.
Yog li ntawd, U txhais li cas hauv physics?
- Hauv classical mechanics, U feem ntau yog siv los ua lub zog muaj peev xwm. Tshwj xeeb, nws tau siv los ua lub cim forgravitational muaj peev xwm zog thiab elastic muaj peev xwm zog. - Electrodynamics, U yog siv los sawv cev hluav taws xob muaj peev xwm. - Hauv thermodynamics, U feem ntau yog siv los ua lub cim rau lub zog sab hauv.
Dab tsi yog qhov nrawm hauv physics rau menyuam yaus?
Ceev yog qhov loj ntawm ceev . Ceev ceev yog cov ceev ntawm ib yam khoom ntxiv rau nws txoj kev taw qhia. Ceev yog hu ua scalar kom muaj nuj nqis thiab ceev yog vector kom muaj nuj nqis.
Pom zoo:
Yuav ua li cas koj xam pab neeg tshaj tawm hauv kev nyab xeeb?
Pab pawg neeg qhov nrawm rau kev rov ua dua yog sib npaug ntawm cov ntsiab lus rau tag nrho cov dab neeg ua tiav uas tau ntsib lawv Cov Lus Txhais Ua tiav (DoD). Raws li pab neeg ua hauj lwm ua ke dhau sij hawm, lawv qhov nruab nrab tshaj tawm (ua tiav zaj dab neeg cov ntsiab lus ib iteration) ua kom ntseeg tau thiab kwv yees
Yuav ua li cas tshwm sim rau ib yam khoom kab rov tav tshaj tawm thaum nws nyob hauv huab cua?
Yog tias cov khoom muaj qhov loj dua ntawm kab rov tav tshaj tawm, nws yuav mus deb dua thaum lub sijhawm nws nyob hauv huab cua, tab sis raws li qhov saum toj no ob qhov sib npaug qhia, lub sijhawm nws siv hauv huab cua tsis yog nyob ntawm tus nqi ntawm nws txoj kab rov tav tshaj tawm
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Yuav ua li cas koj pom qhov nruab nrab tshaj tawm ntawm qhov tshaj tawm vs lub sijhawm teeb?
Qhov chaw nyob hauv qab qhov nrawm / lub sijhawm nkhaus yog tag nrho cov kev hloov pauv. Yog tias koj faib qhov ntawd los ntawm kev hloov pauv hauv lub sijhawm, koj yuav tau txais qhov nruab nrab tshaj tawm. Velocity yog vector daim ntawv ntawm kev ceev. Yog tias qhov nrawm ib txwm tsis yog qhov tsis zoo, ces qhov nruab nrab tshaj tawm thiab qhov nruab nrab ceev yog tib yam