Video: Qhov twg tuaj yeem ua rau txo qis ntawm lub zog ntawm cov khoom txav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Momentum ntawm a khoom yog sib npaug rau nws cov huab hwm coj multiplied los ntawm nws tshaj tawm. ( Momentum yog vector kom muaj nuj nqis vim kev tshaj tawm yog vector). Txo qis qhov loj los yog ceev yuav txo zog . Ib txhia los yog tag nrho cov lub zog ntawm ib khoom ua tau raug xa mus rau lwm tus khoom los ntawm kev sib tsoo nrog nws.
Ua li no, dab tsi ua rau nce lossis txo qis hauv lub zog?
Impulse cuam tshuam Momentum Txhua yam khoom txav tuaj yeem muaj lub zog . Qhov no yog vim lub zog yog qhov loj hauv kev txav. Yog li ntawd yog koj nce ib yam khoom loj, koj thiab nce nws lub zog . Tib yam muaj tseeb rau kev tshaj tawm: nce lossis txo yam khoom ceev, thiab koj nce lossis txo nws lub zog los ntawm tib tus nqi.
Qhov thib ob, dab tsi yog qhov cuam tshuam rau lub zog ntawm ib qho khoom? Teb - ob yam cuam tshuam rau lub zog , uas yog, qhov loj ntawm lub khoom thiab nws qhov nrawm. (Kev nrawm, tsis nrawm, raws li kev taw qhia yog ib feem tseem ceeb ntawm lub zog muab tias nws yog vector kom muaj nuj nqis).
Raws li qhov tshwm sim, lub zog ntawm qhov khoom hloov pauv tau?
Yog hais tias ib tug quab yuam ua nyob rau hauv tib txoj kev raws li lub cov khoom kev txav, ces lub zog speeds lub khoom nce. Txawm li cas los xij, lub zog yuav hloov lub nrawm ntawm ib khoom . Thiab yog hais tias tus ceev ntawm lub khoom hloov, ces tus lub zog ntawm khoom hloov.
Puas muaj lub zog tsis zoo?
Kev piav qhia: Momentum yog vector kom muaj nuj nqis, muab los ntawm tus cov khoom ntawm ib yam khoom loj thiab tshaj tawm. Yog tus ceev ntawm tus khoom yog tsis zoo , i.e. tus khoom yog taug kev nyob rau hauv dab tsi tau xaiv raws li qhov tsis zoo kev taw qhia, lub zog tseem yuav tsis zoo.
Pom zoo:
Dab tsi yog lub zog uas tuaj yeem tshwm sim ntawm qhov chaw ua si los ua kom cov khoom pib txav mus los?
Kev sib txhuam. Thaum lub ntiajteb txawj nqus yog ib qho tseem ceeb ntawm physics rau qhov chaw ua si swb, kev sib txhuam yog qhov tseem ceeb sib npaug. Kev sib txhuam ua haujlwm tiv thaiv lub ntiajteb txawj nqus kom qeeb tus neeg qhovntsej thiaj tsis mob ntawm tus swb. Kev sib txhuam yog ib qho quab yuam uas tshwm sim thaum twg ob yam khoom rub tawm rau ib leeg, xws li swb thiab ib tus neeg lub nraub qaum
Dab tsi yog qhov kev hloov pauv ntawm cov khoom uas txav ntawm qhov chaw mus rau qhov chaw ntawm - 12 m?
Kev piav qhia: Qhov kev txav ntawm ib qho khoom txav ntawm qhov chaw mus rau qhov chaw ntawm − 12 m yog 12 meters. Qhov kev ncua deb ntawm lub hauv paus chiv keeb mus rau qhov siab tshaj plaws txoj hauj lwm yog hu ua displacement ntawm ib yam khoom. Qhov siab tshaj plaws kev hloov pauv ntawm cov khoom nyob rau hauv ib nthwv dej yog hu ua crest thiab qhov tsawg kawg nkaus hloov pauv yog hu ua trough
Cov dej puas txav los ntawm qhov siab mus rau qis qis?
Osmosis: Hauv osmosis, dej ib txwm txav los ntawm thaj tsam ntawm cov dej siab dua mus rau ib qho ntawm cov concentration qis dua. Nyob rau hauv daim duab qhia, lub solute tsis tuaj yeem dhau los ntawm cov xim permeable, tab sis cov dej tuaj yeem. Dej muaj ib tug concentration gradient nyob rau hauv no system
Txoj cai thermodynamic twg hais tias koj Tsis tuaj yeem hloov 100 feem pua ntawm cov cua sov rau hauv cov khoom siv hluav taws xob ntawm cov lus teb xaiv?
Txoj Cai thib ob
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