Uniform tsab ntawv tsa suab thiab nws cov nta

Cov ntau yam ntawm taw, xws kawm seem ntawm physics, raws li cov kinematics, muaj xws li nyob rau hauv uas lub cev rau tej arbitrarily xaiv sib npaug zos Team sib lub sij hawm kis tau sib npaug zos ntev feem ntawm txoj kev. Nws - niaj hnub tsa suab. Ib qho piv txwv yog lub zog ntawm ib tug skater nyob rau hauv nruab nrab-deb lub tsheb ciav hlau los yog rau ib tug ca stretch.

Raws, lub cev yuav tsiv mus nyob nrog tej kev, xws li nkhaus. Nyob rau hauv cov ntaub ntawv no, muaj yog lub tswvyim ntawm txoj kev - li ntawd, qhov kev ncua deb mus ncig los ntawm lub cev raws nws txoj kev. Kev - ib tug scalar kom muaj nuj nqis, thiab yuav tsum tsis txhob yuav tsis meej pem nrog lub zog. Cov yav tas sij hawm qhia lub luv ntawm lub starting taw tes thiab qhov kawg txoj kev uas yog nyob rau hauv tsab ntawv tsa suab curvilinear txhob txwm tshaj tawm tsis coincide nrog lub trajectory. Mus ncig teb chaws - vector kom muaj nuj nqis muaj ib tug hais txog zauv tus nqi sib npaug zos rau qhov ntev ntawm lub vector.

Cov lus nug tshwm sim - nyob rau hauv tej zaum peb yuav tau tham txog lub uniform tsab ntawv tsa suab? Nws yuav muab suav hais tias ib tug niaj hnub tsa suab, xws li ib tug carousel nyob rau hauv ib lub voj voog nrog tus ceev tib yam? Tsis yog, vim hais tias nyob rau hauv xws li ib tug tsab ntawv tsa suab tshaj tawm vector hloov nws kev taw qhia txhua txhua ob.

Lwm cov piv txwv - lub tsheb yog mus tsham nyob rau hauv ib tug ncaj kab nyob rau tib lub ceev. Xws li ib tug tsab ntawv tsa suab yuav tsum tswv niaj hnub, thaum lub sij hawm lub tsheb yuav tsis ntog thiab lub speedometer nws yog tib yam pes tsawg tus. Obviously, cov niaj hnub zog yeej ib txwm tshwm sim nyob rau hauv ib tug ncaj kab, qhov tshaj tawm vector yog tsis tau hloov. Txoj kev thiab lub zog nyob rau hauv cov ntaub ntawv no yuav tsum yog tib yam.

Uniform zog - zog nyob rau hauv ib txoj kab ncaj nraim trajectory ntawm qhov ceev, nyob rau qhov ntev ntawm txoj kev traversed Team sib rau tej sij hawm Team sib yog zoo tib yam. Ib tug tshwj xeeb cov ntaub ntawv ntawm niaj hnub tsa suab yuav suav hais tias raws li ib tug lub xeev ntawm so, thaum lub ceev thiab qhov kev ncua deb mus yog sib npaug zos rau zero.

Ceev yog cov zoo cov yam ntxwv niaj hnub tsa suab. Obviously, sib txawv khoom yog ib tug thiab tib txoj kev nyob rau hauv ib tug txawv lub sij hawm (cov neeg taug kev thiab lub tsheb). Cwj pwm them uniformly mus lub cev ntawm qhov ntev ntawm lub sij hawm uas txoj kev yog dhau, hu ua cov kev ceev ntawm lub zog.

Yog li, cov mis piav txog lub uniform tsab ntawv tsa suab, yog raws li nram no:

V = S / t; qhov twg V - tshaj tawm (ib tug vector kom muaj nuj nqis);

S - los yog tsiv txoj kev;

t - lub sij hawm.

Paub cov kev ceev, uas yog qhov, peb yuav tau xam txoj kev traversed los ntawm lub cev rau tej arbitrary lub sij hawm ntawm lub sij hawm.

Tej zaum yuam tov tusyees thiab uniformly ceev tsab ntawv tsa suab. Qhov no yog ib tug txawv kiag li tswvyim. Uniformly ceev tsab ntawv tsa suab - ib tug embodiment ntawm sis tsis ncaj cov lus tsa suab (.. Ie tias nyob rau hauv uas cov kev ceev tsis yog tas li), uas muaj ib qho tseem ceeb feature - tus ceev nyob rau hauv xws li ib tug tsab ntawv tsa suab txawv rau tib Team sib rau tib tus nqi. Qhov no tus nqi yog sib npaug zos rau cov txheeb ze tshaj tawm txawv qhov ntev ntawm lub sij hawm thaum lub sij hawm uas cov kev ceev hloov no yog hu ua acceleration. Qhov no muaj pes tsawg tus qhia tus nqi uas lub ceev yog nce los yog poob ib chav tsev ntawm lub sij hawm tej zaum yuav loj (ces hais tias lub cev yog sai nkag mus rau hauv los yog poob ceev) los yog negligible thaum tus kwv accelerates los yog slows ntau ntseeg nkaws.

Acceleration raws li tshaj tawm yog cov vector cev kom muaj nuj nqis. Acceleration vector nyob rau hauv cov kev taw qhia yeej ib txwm coincides nrog tus tshaj tawm vector. Ib qho piv txwv ntawm uniformly ceev tsab ntawv tsa suab yog cov ntaub ntawv ntawm free caij nplooj zeeg ntawm cov kev kawm, nyob rau lub ntog ceev (ceev attraction khoom ntiaj teb nto) mas nws txawv nyob rau hauv ib chav tsev ntawm lub sij hawm los ntawm ib tug tej yam muaj nuj nqis hu ua lub acceleration ntawm free caij nplooj zeeg.

Uniform zog yuav raws tau saib raws li ib tug tshwj xeeb cov ntaub ntawv ntawm uniformly ceev. Obviously, txij thaum lub ceev nyob rau hauv xws li ib tug tsab ntawv tsa suab yeej tsis hloov li, cov acceleration los yog deceleration tsis tshwm sim, yog li ntawd, lub acceleration nqi thaum lub sij hawm niaj hnub tsa suab yog ib txwm sib npaug zos rau zero.