Acceleration vs Deceleration
Acceleration yog ib lub tswv yim tseem ceeb hauv kev kawm txog kev txav ntawm lub cev thiab hauv lub neej txhua hnub thiab nws tau dhau los ua ib qho chaw siv hauv peb qhov kev sib tham txhua hnub. Peb siv nws los piav txog txhua lub tsheb lossis cov khoom siv nrawm li thaum lub tsheb zips dhau ntawm peb lub tsheb thiab peb hais tias nws nrawm dua. Acceleration yog tus nqi ntawm kev hloov ceev thiab nws yuav ua tau zoo los yog tsis zoo. Thaum tus nqi yog qhov zoo, peb tab tom cuam tshuam nrog acceleration thiab thaum tus nqi yog qhov tsis zoo, peb tab tom cuam tshuam nrog deceleration uas yog thaum qhov ceev ntawm cov khoom txav tau qis dua. Nyeem rau kom paub qhov txawv ntawm acceleration thiab deceleration.
Acceleration tshwm sim thaum qhov ceev ntawm ib qho khoom txav nce, thiab deceleration yog qhov tsis zoo acceleration. Yog li thaum koj tsav koj lub tsheb thiab thawb lub paddle ceev koj muab acceleration rau lub tsheb uas txhais tau hais tias koj yuav ceev. Ntawm qhov tsis sib xws, thaum koj pom ib tus neeg tuaj rau pem hauv ntej, lossis thaum koj pom lub teeb liab ntawm qhov chaw hla, koj thawb lub nres nres, koj pib txoj kev nres tsheb. Qhov no yog thaum koj muab deceleration rau lub tsheb. Yog li thaum acceleration ua rau cov khoom txav nrawm dua, deceleration ua rau cov khoom txav kom qeeb lossis nres kiag li.
Acceleration yog vector kom muaj nuj nqis raws li nws yog tus nqi hloov ntawm kev tshaj tawm. Yog li nws tsis tsuas yog xav tau qhov loj, koj kuj xav tau kev taw qhia los hais txog nws. Raws li Newton txoj cai thib 2 ntawm kev txav mus los, lub zog ua rau lub cev ntawm pawg m yog qhov khoom ntawm nws qhov loj thiab nws qhov nrawm.
F=m. a
Thaum koj nce koj lub tsheb nrawm, nws nrawm mus txog lub sijhawm nws ncav cuag nws qhov siab tshaj plaws thiab tom qab ntawd nws khiav ntawm qhov ceev tshaj plaws tab sis tsis nrawm dua.
In luv:
• Kev nrawm yog hais txog tus nqi ntawm kev hloov pauv hauv qhov nrawm thiab nws qhov txiaj ntsig zoo qhia tau tias qhov nrawm ntawm cov khoom txav tau nce ntxiv thaum lub sijhawm deceleration yog qhov sib txawv ntawm kev nrawm thiab nws siv thaum qhov nrawm ntawm lub cev txav zuj zus.
• Deceleration tseem hu ua retardation.
