Lub ncauj lus no yuav muaj txiaj ntsig tsis yog rau cov tub ntxhais kawm theem siab xwb, tab sis tseem rau cov neeg laus. Tsis tas li ntawd, tsab xov xwm yuav txaus siab rau cov niam txiv uas xav piav qhia txog tej yam yooj yim ntawm natural sciences rau lawv cov menyuam. Ntawm cov ntsiab lus tseem ceeb yog ceev hauv physics.
Ntau zaus, cov tub ntxhais kawm tsis tuaj yeem paub daws cov teeb meem, paub qhov txawv ntawm hom kev nrawm, thiab nws nyuaj rau nkag siab txog cov ntsiab lus tshawb fawb. Ntawm no peb yuav xav txog txhua yam hauv cov lus siv tau ntau dua, kom txhua yam tsis yog tsuas yog meej, tab sis txawm tias nthuav. Tab sis koj tseem yuav tsum nco ntsoov qee yam, txij li kev kawm txuj ci (physics thiab lej) yuav tsum nco cov qauv, ntsuas ntsuas thiab, tau kawg, lub ntsiab lus ntawm cov cim hauv txhua tus qauv.
Nws ntsib qhov twg?
Pib nrog, cia peb nco ntsoov tias lub ncauj lus no hais txog ib ntu ntawm physics li mechanics, ntu "Kinematics". Tsis tas li ntawd, txoj kev kawm ntawm kev ceev tsis xaus ntawm no, nws yuav nyob rau hauv cov ntu hauv qab no:
- optics,
- hloov pauv thiab nthwv dej,
- thermodynamics,
- quantum physics thiab lwm yam.
Tsis tas li, lub tswv yim ntawm kev nrawm muaj nyob hauv chemistry, biology, geography, computer science. Hauv physics, lub ntsiab lus "ceev" feem ntau ntsib thiab kawmin-depth.
Ntxiv rau, lo lus no yog siv nyob rau hauv lub neej txhua hnub los ntawm peb txhua tus, tshwj xeeb tshaj yog cov neeg tsav tsheb, tsav tsheb. Txawm tias muaj kev paub dhau los ua noj qee zaum siv cov kab lus xws li "tua qe dawb nrog lub tov khoom ntawm qhov nruab nrab ceev."
Yuav ua li cas yog ceev?
Speed hauv physics yog ib qho kinematic ntau. Nws txhais tau hais tias qhov kev ncua deb ntawm lub cev mus rau hauv ib lub sijhawm. Cia peb hais tias ib tug tub hluas tsiv ntawm tsev mus rau ib lub khw, npog ob puas meters hauv ib feeb. Ntawm qhov tsis sib xws, nws tus pog laus yuav dhau los ntawm tib txoj kev hauv rau feeb hauv cov kauj ruam me me. Ntawd yog, tus txiv neej txav nrawm dua li nws cov kwv tij laus, vim nws nce nrawm dua, ua cov kauj ruam ntev heev.
Yuav tsum hais txog ib lub tsheb: ib lub tsheb mus nrawm dua thiab qeeb qeeb, vim qhov ceev sib txawv. Tom qab ntawd peb yuav saib ntau yam piv txwv ntsig txog lub tswvyim no.
Formula
Nyob ntawm tsev kawm ntawv, cov qauv kev nrawm hauv physics yog qhov yuav tsum tau txiav txim siab txhawm rau ua kom yooj yim rau kev daws teeb meem.
- V yog, feem, qhov nrawm ntawm kev txav;
- S yog qhov kev ncua deb ntawm lub cev thaum tsiv ntawm ib qho chaw mus rau lwm qhov;
- t – sij hawm mus ncig.
Koj yuav tsum nco ntsoov cov qauv, vim tias nws yuav los ua ke rau yav tom ntej thaum daws teeb meem ntau thiab tsis yog xwb. Piv txwv li, tej zaum koj yuav xav li casnrawm ntawm tsev mus rau qhov chaw ua haujlwm lossis qhov chaw kawm. Tab sis koj tuaj yeem paub qhov kev ncua deb ua ntej siv daim ntawv qhia ntawm koj lub smartphone lossis khoos phis tawj, lossis siv daim ntawv version, paub qhov ntsuas thiab muaj tus kav nrog koj. Tom ntej no, koj yuav tsum nco ntsoov lub sijhawm ua ntej koj pib tsiv. Thaum koj mus txog ntawm koj qhov chaw, saib pes tsawg feeb lossis teev nws tau dhau mus yam tsis tau nres.
nws ntsuas li cas?
Speed ntau zaus ntsuas hauv SI units. Hauv qab no tsis yog tsuas yog units, tab sis kuj piv txwv ntawm qhov chaw uas lawv siv:
- km/h (km/h) - tsheb thauj mus los;
- m/s (meter per second) - cua;
- km / s (km / s) - qhov chaw khoom, foob pob hluav taws;
- mm/h (millimeter per hour) - kua.
Cia thawj saib seb qhov twg cov feem pua ntawm qhov twg los thiab vim li cas chav ntsuas ntsuas tsuas yog qhov ntawd. Ua tib zoo mloog cov qauv physics kom ceev. Koj pom dab tsi? Tus lej yog S (qhov deb, txoj kev). Qhov kev ncua deb ntsuas li cas? Nyob rau hauv kilometers, meters, millimeters. Nyob rau hauv tus denominator, feem, t (lub sij hawm) - teev, feeb, vib nas this. Li no, units ntawm kev ntsuas ntawm qhov ntau yog raws nraim tib yam li tau nthuav tawm nyob rau hauv qhov pib ntawm ntu no.
Cia peb koom nrog koj txoj kev kawm ntawm cov qauv ntsuas nrawm hauv physics raws li hauv qab no: lub cev yuav kov yeej qhov kev ncua deb ntawm lub sijhawm tshwj xeeb? Piv txwv li, ib tug neeg taug kev 5 km hauv 1 teev. Tag nrho: qhov ceev ntawm ib tug neeg yog 5 km / h.
Nws nyob ntawm dab tsi?
Ntau zaus, cov kws qhia ntawv nug cov tub ntxhais kawm cov lus nug: "Dab tsi txiav txim siab qhov ceev?". Cov tub ntxhais kawm feem ntau poob thiab tsis paub yuav hais li cas. Qhov tseeb, txhua yam yog heevyooj yim. Tsuas yog saib cov qauv rau ib qho lus pom kom tshwm. Qhov ceev ntawm lub cev hauv physics nyob ntawm lub sijhawm ntawm kev txav thiab kev ncua deb. Yog tias tsawg kawg yog ib qho ntawm cov kev txwv no tsis paub, nws yuav daws tsis tau qhov teeb meem. Tsis tas li ntawd, lwm hom kev nrawm tuaj yeem pom hauv qhov piv txwv, uas yuav tau tham hauv cov lus hauv qab no ntawm kab lus no.
Nyob hauv ntau txoj haujlwm hauv kinematics, koj yuav tsum tsim cov duab kev vam meej, qhov twg X-axis yog lub sijhawm, thiab Y-axis yog nyob deb, txoj kev. Los ntawm cov duab zoo li no, ib tus tuaj yeem txheeb xyuas qhov xwm txheej ceev ntawm kev txav mus los. Nws yog ib nqi sau cia hais tias nyob rau hauv ntau txoj hauj lwm hais txog kev thauj, hluav taws xob tshuab feem ntau siv cov duab. Piv txwv li, ntawm txoj kev tsheb ciav hlau.
ntsuas nrawm ntawm lub sijhawm zoo
Muaj lwm lub ntsiab lus uas ntshai cov tub ntxhais kawm theem nrab - nrawm nrawm. Hauv physics, lub tswv yim no tshwm sim raws li lub ntsiab lus ntawm qhov loj ntawm qhov nrawm hauv lub sijhawm tam sim ntawd.
Cia li saib ib qho piv txwv yooj yim: tus tsav tsheb tsav tsheb ciav hlau, nws tus pab saib xyuas qhov ceev ntawm lub sijhawm. Muaj lub cim txwv ceev hauv qhov kev ncua deb. Koj yuav tsum xyuas seb lub tsheb ciav hlau khiav ceev npaum li cas tam sim no. Tus kws pab tsav tsheb qhia thaum 4:00 teev tsaus ntuj tias qhov ceev yog 117 km / h. Qhov no yog qhov ceev ceev ceev ceev raws nraim ntawm 4 teev tsaus ntuj. Peb feeb tom qab, qhov ceev yog 98 km / h. Qhov no kuj yog qhov nrawm nrawm txheeb ze rau 16 teev 03 feeb.
Pib ntawm kev txav
Yog tsis muaj qhov pib nrawm, physics tsis sawv cev yuav luag txhua qhov kev txav mus lostshuab. Qhov no parameter yog dab tsi? Qhov no yog qhov ceev ntawm qhov khoom pib txav. Cia peb hais tias lub tsheb tsis tuaj yeem pib txav tam sim ntawd ntawm qhov ceev ntawm 50 km / h. Nws yuav tsum tau ceev. Thaum tus neeg tsav tsheb nias lub pedal, lub tsheb pib txav tau yooj yim, piv txwv li, thaum xub thawj 5 km / h, ces maj mam 10 km / h, 20 km / h thiab lwm yam (5 km / h yog qhov pib ceev).
Tau kawg, koj tuaj yeem pib ntse, zoo li cov neeg ncaws pob ncaws pob, thaum ntaus pob ntaus pob tesniv nrog racket, tab sis tseem muaj qhov pib nrawm. Los ntawm peb cov qauv, tsuas yog lub hnub qub, ntiaj chaw thiab satellites ntawm peb Galaxy tsis muaj nws, vim peb tsis paub thaum twg lub zog pib thiab yuav ua li cas. Tom qab tag nrho, mus txog rau thaum tuag, qhov chaw khoom nres tsis tau, lawv ib txwm nyob rau hauv motion.
Txawm nrawm
Speed hauv physics yog kev sib txuas ntawm tus kheej phenomena thiab cov yam ntxwv. Kuj tseem muaj qhov sib xws thiab tsis sib xws, curvilinear thiab rectilinear. Cia peb muab piv txwv: ib tug neeg taug kev raws txoj kev ncaj ntawm tib lub nrawm, kov yeej qhov kev ncua deb ntawm 100 meters ntawm point A mus rau taw tes B.
Ntawm ib sab, nws tuaj yeem hu ua rectilinear thiab tsis sib xws ceev. Tab sis yog tias koj txuas qhov tseeb ceev thiab cov kev ntsuas sensors rau ib tus neeg, koj tuaj yeem pom tias tseem muaj qhov sib txawv. Qhov ceev tsis sib xws yog thaum qhov ceev hloov tsis tu ncua lossis tas li.
Nyob hauv lub neej txhua hnub thiab thev naus laus zis
Kev nrawm ntawm kev txav hauv physics muaj nyob txhua qhov chaw. Txawm tias microorganisms txav, ciathiab ntawm qhov qeeb qeeb heev. Nws yog ib qho tsim nyog sau cia tias muaj kev sib hloov, uas kuj yog tus yam ntxwv ntawm kev ceev, tab sis muaj ib chav ntsuas - rpm (revolutions ib feeb). Piv txwv li, qhov ceev ntawm kev sib hloov ntawm lub nruas hauv lub tshuab ntxhua khaub ncaws. Chav ntsuas no yog siv rau txhua qhov chaw uas muaj cov tshuab thiab tshuab (lub cav, lub cev muaj zog).
Nyob hauv geography thiab chemistry
Txawm tias dej muaj qhov nrawm nrawm. Physics tsuas yog ib qho kev tshawb fawb hauv thaj tsam ntawm cov txheej txheem tshwm sim hauv qhov xwm txheej. Piv txwv li, cua ceev, nthwv dej hauv hiav txwv - tag nrho cov no yog ntsuas los ntawm lub cev ib txwm muaj, qhov ntau.
Muaj tseeb tiag, ntau tus ntawm koj paub cov kab lus "tus nqi ntawm cov tshuaj tiv thaiv tshuaj." Tsuas yog hauv chemistry nws muaj lub ntsiab lus sib txawv, vim nws txhais tau tias ntev npaum li cas qhov no lossis cov txheej txheem yuav tshwm sim. Piv txwv li, poov tshuaj permanganate yuav yaj sai dua hauv dej yog tias koj co lub nkoj.
Tsis pom kev nrawm
Muaj qhov tshwm sim tsis pom. Piv txwv li, peb tsis tuaj yeem pom tias cov teeb pom kev zoo li cas, cov hluav taws xob sib txawv txav mus li cas, lub suab nrov npaum li cas. Tab sis yog tias tsis muaj qhov txav ntawm lawv cov khoom, ces tsis muaj qhov tshwm sim no yuav muaj nyob hauv qhov xwm txheej.
Informatics
Yuav luag txhua tus neeg niaj hnub ntsib nrog lub tswv yim ntawm "ceev" thaum ua haujlwm hauv computer:
- Internet ceev;
- page loading ceev;
- CPU thauj khoom ceev thiab lwm yam.
Muaj ntau tus piv txwv ntawm kev nrawm ntawm kev txav hauv physics.
Tom qab nyeem tsab xov xwm kom zoo, koj tau paub txog lub tswvyimceev, nrhiav seb nws yog dab tsi. Cia cov ntaub ntawv no pab koj kawm txog ntu "Mechanics" kom tob, qhia kev txaus siab rau nws thiab kov yeej kev ntshai thaum teb hauv cov lus qhia. Tom qab tag nrho, ceev hauv physics yog ib lub tswv yim uas yooj yim rau nco.
