Uas kawm cov kinematics? Ntsiab magnitude thiab ua hauj lwm

Uas kawm cov kinematics? Nrog lo lus nug no yuav luag tam sim ntawd muag los ntawm cov tub ntxhais kawm qib xya, tsuas yog los ntawm txoj kev tshawb no ntawm physics. Niaj hnub no peb tham txog qhov tseeb hais tias kawm kinematics uas lub tswv yim nyob rau hauv nws yog cov tseem ceeb tshaj plaws. Xav txog cov neeg mob thiab cov kev qhia tswj ntawm no ceg ntawm physics, peb yuav tsum to taub nrog dab tsi mis nws yuav siv tau thiab thaum nws yuav tsum tau ua li cas.

Yuav ua li cas yog kev kawm mechanics, kinematics, puab?

Ua ntej ntawm tag nrho cov, cia peb ua, thiaj li los hais lus, lub demarcation kab nruab nrab ntawm cov peb lub tswv yim. Txhua yam yog ib tug ntawm lub cev partitions. Nyob rau nws koj yuav hais tias nws twb tau kawm mechanics ntawm tsiv lub cev ntawm cov kev cai. Tab sis xws li cov ntsiab lus txhais nyeem ntawv yuav nrhiav thiab ces, thaum nws los txog rau lub zog ntawm kinematics.

Yog li ntawd dab tsi yog qhov txawv?

Wb sim pib nrog lub fact tias kawm lub kinematics thiab hais tias qhov no science yog. Nyob rau hauv qhov tseeb, kinematics yeej tsis tau ywj siab. Nws yog tsis muaj lwm yam tshaj li cov mechanics seem. Tag nrho peb ntawm lawv: kinematics, puab thiab statics. Tag nrho cov peb seem yog Attendance txhua yam pawg, piv txwv li kawm sis raug zoo ntawm lub cev thiab tshwj xeeb tshaj yog lawv lub zog. Txawm li cas los, lawv txhua tus muaj ib yam ntxwv.

Lub subtleties ntawm cov khej

Kinematics yog tej zaum cov feem ntau nthuav seem nyob rau hauv cov nqe lus ntawm kev daws teeb meem. Ib tug ntau ntau yam ntawm combinatorial kev daws teeb meem tiag tiag lossis loj uas duav txhua yam rau lawv tej kev npaj - nws tag nrho cov ua ib tug ncej txheem rau uas mus pib lub koob meej ntawm kinematics. Los ntawm txoj kev, txawm qhib cov kev ntsuam xyuas los npaj rau cov tub ntxhais nyob rau hauv lub 9 qib, peb twb tam sim ntawd tau ua txhum rau tej yam yooj yim piv txwv. Hais tias kawm kinematics, peb yuav hais tias nws txiav txim siab rau cov yam ntxwv ntawm cov lus tsa suab ntawm lub cev tsis tau noj mus rau hauv tus account lub rog ntawm kev sib tshuam.

Ib me ntsis nyuab dua yog cov ntaub ntawv nrog rau cov nqe lus ntawm mechanics, puab. Nws kuj suav tias yog lub suab ntawm lub cev thiab coj qhov tseem ceeb tshwm sim. Qhov no, piv txwv li, ceev, nyob deb li, lub sij hawm. Tab sis muaj yog thiab ib tug xov tooj ntawm peb-tog cov lus. Ntawm no yog lub yooj yim cov kev cai ntawm cov lus tsa suab tsis tau tawm, nws yog tsim nyog los xav txog ib tug cov neeg kho tshuab system, noj mus rau hauv tus account lub rog sawv ib tug lub cev. Tab sis kev tshawb fawb muaj zoo li qub equilibrium cai nyob rau hauv cov neeg kho tshuab tshuab. Muaj tshwm sim tsis tau tsuas yog lub cev thiab tej caj npab thiab lwm yam hais.

Yuav ua li cas yog lub hauv paus ntawm lub kinematics?

Yog li ntawd, peb pom hais tias lub kinematics kawm lub suab ntawm lub cev tsis muaj kev xav txog cov rog kuj nyob rau hauv cov ntaub ntawv uas taw tes. Tab sis dab tsi yog lub hauv paus ntawm ntu no, mechanics, tsuas yog cov yuav tsum muaj kev cai lij choj? Ntsiab thiab txhais cov ntsiab - nws yog yeej zoo, tab sis nyob rau hauv qhov tseeb ib txoj kev xav, peb yuav tsis tau siv nyob rau hauv kev daws teeb meem. Thaum tus heev tsawg, mus cuag ib tug zoo tshwm sim los yog tshwm sim, peb yuav muaj mus rau chaw uasi rau cov qauv. Thiab ua li no, ua ntej wb nrog rau qhov tseem ceeb uas lawv yuav tsum tau featured.

Lub ntsiab ntau siv nyob rau hauv lub kinematics teeb meem

Yuav pib, peb xav nco ntsoov nyeem hais tias lawv yuav muaj ib tug extraordinary cim. Peb pib nrog ib tug yooj yim nqi uas peb hu yov. Nws yog ib tug scalar kom muaj nuj nqis. Xws li muaj xwb ib tug tej yam muaj nuj nqis. Peb meters, uas dov ib lub pob. 25 meters uas sailed kis las. Kaum kilometers mus los ntawm ib tug neeg rau ib tug tag nrho ib hnub. Tag nrho cov no - lub suav qhov tseem ceeb uas peb hu yov.

Ib me ntsis txawv yog cov ntaub ntawv nrog cov kev ceev thiab acceleration yog nyob rau hauv lub kinematics (thiab nyob rau hauv general) muaj ib tug dual xwm. Nyob rau hauv ib tes, peb muaj peev xwm muab ib tug zauv tus nqi ntawm cov kev ceev. Cia nws yuav tsib, kaum, nees nkaum meters ib ob. Tab sis cov kev ceev thiab cov kev taw qhia yog. Nws coincides nrog cov kev taw qhia ntawm lub zog ntawm lub cev, nws yog cuab kev. Ib yam li ntawd, nws yog ib lub acceleration. Txawm li cas los, tus ceev thiab acceleration yuav tsum tau qhia nyob rau hauv txawv kev qhia. Nyob rau hauv cov ntaub ntawv no, lub cev yuav qeeb. Xav txog tej yam uas lub tsheb yog cia li pib mus mus, nrog txhua txhua ob tos ceev. Cov kev tshaj tawm thiab acceleration nyob rau hauv tib txoj kev coj, uas cov kev ceev ntawm lub cev tsub kom nrog txhua txhua ob. Tab sis thaum muaj ib tug deceleration ntawm lub vector yog qhia nyob rau hauv txawv kev qhia.

Kinematics - ib tug seem ntawm mechanics uas kawm lub suab ntawm lub cev. Tab sis dab tsi yuav tau kawm, yog hais tias peb tsis siv lub sij hawm no yuav luv? Ntawm no nws yog - lwm tus nqi siv los daws teeb meem thiab piav qhia txog cov kev cai ntawm physics nyob rau hauv seem no. Nws, nrog rau qhov kev ncua deb, ceev thiab acceleration, yog muaj nyob rau hauv ib co qauv, feem ntau nquag siv rau tsav kev txiav txim siab. Cia saib ib tug ncaj yooj yim ua hauj lwm ntawm cov ntawv no, thaum kawg ntsaub nyob rau hauv kev xyaum ua ntej lawm nyob rau hauv tsab xov xwm tau txais kev tshawb xav.

ua hauj lwm

Yuav kom tau soj ntsuam xyuas cov yam ntxwv ntawm lub tsheb yog raug rho tawm puas-meter ntev uas muaj zoo meej txoj kev. Nws yog lub npe hu hais tias nws cov acceleration yog sib npaug zos rau tsib meters ib ob squared. Nrhiav tawm ntev npaum li cas lub tsheb yuav mus hais tias deb, noj mus rau hauv tus account lub fact tias cov lus tsa suab pib los ntawm so.

Yog li ntawd, txij thaum lub kinematics - ib tug ceg ntawm mechanics uas kawm cov kev cai ntawm cov lus tsa suab ntawm lub cev, peb yuav siv cov coj qauv. Nyob rau hauv kev, nws zoo li _{no: S = V o T + (} -) (ntawm ^ 2) / 2. Tiam sis peb yuav tsum nqa tawm peb kev pab raws qib hloov hom. Nws yog hais tias lub zog yog pib los ntawm standstill. Li no, cov thawj tshaj tawm yog pes tsawg. Li ntawd, cov khoom ntawm cov kev ceev ntawm lub sij hawm ntawm V _o T yog pes tsawg. Txij li thaum lub tsheb accelerates, rau ib lub mis peculiar "+" kos npe rau. Raws li ib tug tshwm sim, nws yuav siv sij hawm li nram qab no daim ntawv: S = (ntawm ^ 2) / 2.

Cov tom ntej no peb qhia lub square ntawm lub sij hawm. Ua li no, peb muab ob sab ntawm no kab zauv rau lub deuce sau dua tshiab nws nyob rau hauv qhov chaw. Thiab tam sim no faib ob zaug rau hauv lub deb mus rau lub acceleration. Cov kauj ruam kawg yuav qhia qhov square hauv paus ntawm cov kev qhia. Zoo, peb twb yooj yim zog lub mis. Tam sim no nws tshwm li: T = sqrt (2s / a). Nws tsuas tseem mus hloov tus xov tooj. Raws li ib tug tshwm sim peb pom tias lub tsheb twb dhau ib tug muab deb rau ib lub sij hawm sib npaug zos rau txog 6,32 vib nas this.