Video: Yuav ua li cas koj paub thaum ib tug particle txav mus rau sab xis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg yog qhov particle txav mus rau sab laug, txoj cai , thiab nres? Thaum qhov nrawm, lossis qhov sib piv ntawm koj txoj haujlwm, tsis zoo, nws yog tsiv sab laug. Thaum qhov nrawm (derivative) yog qhov zoo, nws yog txav mus rau sab xis . Thaum lub nrawm sib npaug rau xoom, nws nres.
Nyob rau hauv no hais txog, dab tsi qhov tseem ceeb ntawm t yog lub particle txav mus rau sab xis?
Yog li yog hais tias qhov nrawm yog denoted los ntawm v ( t ), peb muaj v ( t ) = s'( t )=3 t 2−12 t +9=3( t −1)( t -3). Cov particle yog txav mus rau sab xis thaum lub nrawm yog qhov zoo, thiab sab laug thaum lub nrawm tsis zoo.
Ib yam li ntawd, koj nrhiav tau qhov kev hloov pauv li cas? Rau xam kev hloov chaw , tsuas yog kos ib lub vector los ntawm koj qhov chaw pib mus rau koj txoj haujlwm kawg thiab daws qhov ntev ntawm kab no. Yog tias koj txoj haujlwm pib thiab xaus yog tib yam, zoo li koj txoj kev ncig 5K, ces koj hloov chaw yog 0. Nyob rau hauv physics, hloov chaw yog sawv cev los ntawm Δs.
Tom qab ntawd, ib tug kuj yuav nug, yog qhov khoom txav mus rau sab laug?
Kev piav qhia ntawm qhov zoo thiab qhov tsis zoo acceleration: Xav txog ib qho khoom txav mus rau sab xis raws li tsiv nyob rau hauv ib txoj kev zoo thiab ib qho tsiv mus rau sab laug raws li tsiv nyob rau hauv ib qho kev coj tsis zoo. Xav txog kev ua kom nrawm dua li sawv cev qhov zoo thiab qeeb qeeb raws li qhov tsis zoo.
Qhov kev tshaj tawm tsis zoo txhais li cas?
Kom paub qhov txawv ntawm ob qho kev qhia hauv ceev , koj ua tau muaj qhov zoo thiab a tsis zoo vectors: vectors uas taw tes nyob rau hauv opposite direction. Yog li ntawd, a negative velocity txhais tau tias tias qhov taw qhia ntawd ceev yog rov qab rau lwm tus ceev (nrog tus nqi zoo).
Pom zoo:
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
Yuav ua li cas koj thiaj paub yog hais tias ib tug function tsis yog ib tug function?
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