Uniform rectilinear tsab ntawv tsa suab: lub tswv yim thiab cov yam ntxwv tseem ceeb

Uniform rectilinear tsab ntawv tsa suab: lub tswv yim thiab cov yam ntxwv tseem ceeb
Uniform rectilinear tsab ntawv tsa suab: lub tswv yim thiab cov yam ntxwv tseem ceeb
Anonim

Uniform thiab tsis sib luag yog cov ntsiab lus tseem ceeb tshaj plaws ntawm kinematics. Lub luag haujlwm tseem ceeb ntawm ntu no ntawm physics yog tias, xav txog kev txhais lus ntawm lub cev, nws yuav tsum raug coj mus rau hauv tus account tias tag nrho nws cov ntsiab lus txav mus rau tib qho kev coj ua raws nraim tib yam ceev. Tias yog vim li cas nws tsis tsim nyog los ua tus cwj pwm txav ntawm tag nrho lub cev, koj tuaj yeem txwv koj tus kheej rau ib qho ntawm nws cov ntsiab lus.

Uniform rectilinear motion
Uniform rectilinear motion

Cov yam ntxwv tseem ceeb ntawm txhua qhov kev txav yog nws txoj hauv kev, txav thiab nrawm. Ib txoj hauv kev tsuas yog ib txoj kab uas tsuas muaj nyob hauv kev xav nrog rau qhov uas cov khoom taw qhia txav mus rau hauv qhov chaw. Kev hloov pauv yog vector qhia los ntawm qhov pib taw tes rau qhov kawg taw tes. Thaum kawg, kev ceev yog qhov qhia dav dav ntawm kev txav ntawm qhov taw tes, uas tsis yog nws cov kev taw qhia nkaus xwb, tab sis kuj yog qhov ceev ntawm kev txav mus los ntawm ib lub cev uas coj los ua qhov taw qhia.

Uniform rectilinear tsab ntawv tsa suab yog ib lub tswv yim loj heev uas muaj ob yam tseem ceeb -uniformity thiab straightness.

Ceev ntawm uniform rectilinear tsab ntawv tsa suab
Ceev ntawm uniform rectilinear tsab ntawv tsa suab

Qhov kev txav tsis sib xws txhais tau hais tias nws ua tiav ntawm qhov nrawm tas li yam tsis muaj kev nrawm. Ncaj nraim ntawm kev txav mus los txhais tau tias nws tshwm sim raws txoj kab ncaj nraim, uas yog, nws txoj kev taug yog ib txoj kab ncaj nraim.

Raws li tag nrho cov saum toj no, peb tuaj yeem txiav txim siab tias cov lus tsa suab sib xws yog hom tshwj xeeb ntawm cov lus tsa suab, vim tias lub cev ua haujlwm tib yam hauv lub sijhawm sib npaug. Yog li, los ntawm kev faib ib ntu rau hauv qhov sib npaug (piv txwv li, ib thib ob txhua), nws yuav pom tau tias nrog kev txav mus los saum toj no, lub cev yuav npog tib qhov kev ncua deb rau txhua qhov ntawm cov ntu no.

Uniform thiab txav tsis sib xws
Uniform thiab txav tsis sib xws

Qhov nrawm ntawm cov lus tsa suab sib xws yog vector kom muaj nuj nqis, uas nyob rau hauv cov lej yog sib npaug rau qhov piv ntawm txoj kev taug kev los ntawm lub cev rau lub sijhawm muab rau tus lej tus nqi ntawm lub sijhawm no. Tus nqi no tsis yog nyob ntawm lub sijhawm nyob rau hauv ib txoj kev, ntxiv mus, nws yog tsim nyog sau cia hais tias qhov ceev ntawm uniform rectilinear motion ntawm txhua qhov chaw ntawm lub trajectory kiag li coincides nrog lub zog ntawm lub cev. Nyob rau hauv cov ntaub ntawv no, qhov ntau npaum li cas ntawm qhov nruab nrab ceev rau ib tug arbitrarily coj lub sij hawm ntawm lub sij hawm yog sib npaug rau lub instantaneous ceev.

Uniform rectilinear tsab ntawv tsa suab yog tus cwj pwm los ntawm txoj hauv kev tshwj xeeb rau txoj hauv kev uas lub cev dhau mus rau qee lub sijhawm. Qhov kev ncua deb mus nrog hom kev txav no tsis yogdab tsi tab sis lub zog module. Lub zog, tig mus, yog qhov khoom ntawm qhov nrawm uas lub cev txav mus los ntawm lub sijhawm thaum lub sijhawm ua haujlwm no.

Nws yog ib qho tseem ceeb heev uas yog tias qhov hloov pauv vector coincides nrog cov kev taw qhia zoo ntawm abscissa axis, ces qhov kev kwv yees ntawm kev suav nrawm yuav tsis yog qhov zoo xwb, tab sis kuj coincide nrog tus nqi nrawm.

Uniform rectilinear tsab ntawv tsa suab tuaj yeem sawv cev, ntawm lwm yam, hauv daim ntawv sib npaug, uas yuav cuam tshuam txog kev sib raug zoo ntawm lub cev thiab lub sijhawm.

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