Piv txwv ntawm cov neeg kho tshuab cov lus tsa suab. Neeg kho tshuab zog: Physics, Qib 10

Piv txwv ntawm cov neeg kho tshuab zog paub rau peb los ntawm lub neej txhua hnub. Qhov no dua lub tsheb, dav hlau, ships sailing. Qhov yooj yim piv txwv ntawm cov neeg kho tshuab zog, peb tsim peb tus kheej, dua los ntawm lwm tus neeg. Txhua thib ob ntawm peb ntiaj chaw yog nyob rau hauv tsab ntawv tsa suab nyob rau hauv ob dav hlau: lub hnub thiab nws cov axis. Qhov no, dhau lawm, piv txwv ntawm cov neeg kho tshuab cov lus tsa suab. Yog li ntawd, cia peb tam sim no tham txog qhov no hais.

Yuav ua li cas tshwm sim mechanics

, Wb saib tag nrho cov uas yog hu ua mechanics ua ntej nws tham, yog dab tsi yog cov piv txwv ntawm cov neeg kho tshuab cov lus tsa suab. Peb yuav tsis mus rau hauv lub wilds ntawm scientific thiab khiav lag luam ib tug lossis loj tus naj npawb ntawm cov nqe lus. Yog hais tias peb tham tiag tiag yooj yim heev, lub mechanics - ib tug ceg ntawm physics uas tseem ua hauj lwm nrog lub suab ntawm lub cev. Thiab yog dab tsi nws yuav ua tau, qhov no kws kho tsheb? Cov menyuam kawm ntawv nyob rau hauv physics qhia paub nrog nws tswj. Qhov no kinematics, puab thiab statics.

Txhua lub sib cais no kuj kawm lub suab ntawm lub cev, tab sis muaj ib tug yam ntxwv xwb rau nws tshwj xeeb tshaj yog. Uas, incidentally, yog kheev siv nyob rau hauv kev daws cov teeb meem. Peb pib nrog cov kinematics. Tej niaj hnub tsev kawm ntawv phau los yog ib tug hluav taws xob kev pab yuav ua rau nws paub tseeb hais tias cov lus tsa suab ntawm ib tug txhua yam system kinematics yog suav tias yog tsis tau noj mus rau hauv tus account lub yog vim li cas uas ua rau lub zog. Nyob rau tib lub sij hawm peb paub tias qhov ua rau ntawm lub acceleration, uas yuav ua rau lub cev nyob rau hauv tsab ntawv tsa suab, nws yog force.

Yuav ua li cas yog hais tias tus hwj chim uas koj yuav tsum xav txog

Tab sis xav tias yuav twb sib tshuam xov tooj thaum tsav tsheb yog koom nyob rau hauv lub tom ntej no seem, uas yog hu ua puab. Neeg kho tshuab zog ceev uas yog ib tug ntawm cov tseem ceeb tsis nyob rau hauv lub puab inseparably txuas nrog cov tswvyim no. Qhov kawg ntawm lub seem - statics. Nws tau raug kawm tej yam kev mob ntawm equilibrium ntawm cov neeg kho tshuab tshuab. Qhov yooj yim piv txwv yog lub zoo li qub balancing tes taw hnyav li teev. Nco ntsoov rau cov xib fwb: ib zaj lus qhia nyob rau hauv physics, "cov neeg kho tshuab zog" nyob rau hauv lub tsev kawm ntawv yuav tsum tau pib nrog rau qhov no. Ua ntej, muab piv txwv, thiab ces faib mus rau hauv peb qhov chaw, mechanics, thiab xwb ces npaj mus rau lub so.

Yuav ua li cas yog cov kev sib tw

Txawm yog hais tias peb xa tsuas mus rau ib tug ib seem, cia xav tias nws yog lub kinematics, peb nyob ntawm no yuav ib tug lossis loj tus naj npawb ntawm ntau yam dej num. Qhov no yog hais tias muaj ntau ntau yam kev mob, raws li nyob rau hauv uas, tib neeg ua hauj lwm muaj peev xwm yuav nyob rau hauv ib tug txawv lub teeb. Ntxiv mus, qhov teeb meem nyob rau hauv lub kinematic tsab ntawv tsa suab yuav tsum raug txo kom cov ntaub ntawv ntawm free caij nplooj zeeg. Qhov no peb yuav tam sim no sib tham txog.

Yuav ua li cas yog cov dawb-lub caij nplooj zeeg nyob rau hauv lub kinematics

Qhov no txoj kev muaj peev xwm muab ib tug ob peb cov ntsiab lus txhais. Txawm li cas los, lawv yuav inevitably yuav txo mus rau ib tug taw tes. Thaum ib tug dawb lub caij nplooj zeeg nyob rau hauv lub cev xwb tus quab yuam ntawm lub ntiajteb txawj nqus ua. Nws yog qhia los ntawm qhov chaw ntawm lub cev huab hwm coj raws voos kheej-kheej mus rau lub chaw ntawm lub ntiaj teb. Tus so yuav ua tau "txias" lus thiab txhais cov ntsiab sai li sai tau raws li koj xav. Txawm li cas los, lub xub ntiag ntawm ib tug xwb ntawm lub ntiajteb txawj nqus thaum lub sij hawm xws zog yog ib qho tseem ceeb.

Yuav ua li cas los daws kom tau teeb meem nyob rau hauv lub dawb lub caij nplooj zeeg nyob rau hauv lub kinematics

Ua ntej peb yuav tsum "tau tuav ntawm" cov qauv. Yog hais tias koj nug cov niaj hnub xib fwb nyob rau hauv physics, nws yuav teb koj hais tias cov kev txawj ntse ntawm cov qauv - yog ib nrab ntawm cov tshuaj. Ib tug peb lub hlis twg yog muab rau qhov kev nkag siab txog cov txheej txheem thiab lwm quarter - nyob rau hauv lub xam txheej txheem. Tab sis cov mis, mis mos thiab mis ib zaug dua - qhov no yog li cas yuav muab ib qho kev pab.

Peb yuav hu cov dawb lub caij nplooj zeeg ntawm ib tug tshwj xeeb cov ntaub ntawv ntawm uniformly ceev tsab ntawv tsa suab. Yog vim li cas? Yog, vim hais tias peb muaj tag nrho cov uas nws yuav siv sij hawm. Acceleration yog tsis tau hloov, nws yog 9.8 meters ib ob squared. Nyob rau qhov no hauv paus, peb yuav tsiv mus nyob rau. Formula deb mus ncig los ntawm lub cev thaum uniformly ceev tsab ntawv tsa suab, muaj rau hauv daim: S = Vot + (-) nyob rau hauv ^ 2/2. Ntawm no, S - nrug, VO - thawj zaug tshaj tawm, t - lub sij hawm, ib tug - acceleration. Tam sim no peb yuav sim mus coj cov mis no rau cov ntaub ntawv ntawm free caij nplooj zeeg.

Raws li peb hais ua ntej lawm, qhov no yog ib tug tshwj xeeb cov ntaub ntawv ntawm uniformly ceev tsab ntawv tsa suab. Yog hais tias ib tug - yog ib tug zoo heev los acceleration, g nyob rau hauv (thiab hloov) yuav muaj ib tug meej hais txog zauv tus nqi, kuj hu ua tabular. Cia peb sau dua tshiab cov mis deb mus ncig los ntawm lub cev ntawm cov ntaub ntawv nrog cov dawb lub caij nplooj zeeg: S = Vot + (-) gt ^ 2/2.

Nws yog to taub hais tias nyob rau hauv xws li ib tug cov ntaub ntawv no yuav tshwm sim nyob rau hauv lub ntsug dav hlau. Thov mloog mus rau lub fact tias tsis muaj ntawm cov kev xaiv uas hais tias peb yuav qhia los ntawm cov saum toj no mis, ywj siab ntawm lub cev hnyav. Koj muab pov ib lub thawv los yog pob zeb, piv txwv li, los ntawm lub-ru tsev, los yog nyob rau ob tug sib txawv pob zeb hnyav - cov khoom nyob rau tib lub sij hawm thaum pib ntawm lub caij nplooj zeeg thiab tsaws luag ib txhij.

Freefall. Neeg kho tshuab zog. paub tab

Los ntawm txoj kev, muaj yog xws li ib tug tshaj plaws li instantaneous ceev. Nws yog hais txog cov kev ceev ntawm txhua lub sij hawm lub zog. Thiab nyob rau hauv ib tug dawb caij nplooj zeeg peb yuav txiav txim seb nws yooj yim, paub tsuas yog tus pib tus nqi. Thiab yog hais tias nws yog pes tsawg, yog cov ntaub ntawv no feem ntau yog ib daim ncuav mog qab zib. Formula instantaneous tshaj tawm nyob rau hauv free caij nplooj zeeg nyob rau hauv lub kinematics ntawm daim ntawv no: V = VO + gt. Nco ntsoov tias lub "-" kos npe rau lawm. Tom qab nws yog muab tso rau, thaum lub cev slows cia. Thiab raws li nyob rau hauv lub cev yuav qeeb lub caij nplooj zeeg? Yog li, yog hais tias tus thawj tshaj tawm twb tsis tau qhia, instantaneous yog tsuas sib npaug zos rau cov khoom ntawm lub ntiajteb txawj nqus acceleration g thaum lub sij hawm ntawm ntog t, tau tom qab txij li thaum pib ntawm cov lus tsa suab.

Physics. Neeg kho tshuab cov lus tsa suab nyob rau hauv free caij nplooj zeeg

Wb tawm mus rau ib qho teeb meem nyob rau hauv no qhov teeb meem. Xav hais tias cov nram qab no mob. Cov me nyuam txiav txim siab los muaj ib co kev lom zem thiab muab pov rau ib tug ntaus pob tesniv lub pob mus rau lub ru tsev ntawm lub tsev. Nrhiav tawm dab tsi yog cov kev ceev ib ntaus pob tesniv pob thaum lub caij ntawm tej yam uas muaj hauv av, yog hais tias tus lub tsev muaj kaum ob plag tsev. Qhov siab ntawm ib tug hauv pem teb yuav tsum tau teem sib npaug zos rau peb meters. Cov pob yog tso tawm los ntawm txhais tes.

Lub rooj sib tham no kev sib tw yuav tsis tau ib kauj ruam, raws li tej zaum koj yuav xav hais tias thaum xub thawj. Nws nkawd hais tias txhua yam nkawd impossibly yooj yim, cia li hloov tus yam tooj mus rau hauv cov mis ntawm lub instantaneous tshaj tawm thiab tag nrho. Tab sis thaum lawv ua li ntawd peb muaj peev xwm fim qhov teeb meem: peb tsis paub lub sij hawm ntawm lub caij nplooj zeeg ntawm lub pob. Cia saib tus so ntawm lub ntsiab lus ntawm qhov teeb meem.

Dodge nyob rau hauv

Firstly, peb yuav muab ib tug xov tooj ntawm cov plag tsev, thiab peb paub qhov siab qhov ntawm txhua tus ntawm lawv. Nws yog peb meters. Yog li, peb yuav tam sim ntawd xam lub cev deb los ntawm lub-ru tsev rau hauv av. Secondly, peb paub tau hais tias cov pob yog tso tawm los ntawm txhais tes. Raws li ib txwm, nyob rau hauv cov teeb meem ntawm tus neeg kho tshuab zog (thiab nyob rau hauv cov teeb meem nyob rau hauv general) muaj me me lus, uas tom ntej glance tej zaum yuav tsis zoo li zoo li txhua yam uas muaj nuj nqis. Txawm li cas los, muaj ib qho kev qhia hais tias tus ntaus pob tesniv pob muaj tsis muaj thawj zaug tshaj tawm. Rau yav tom ntej, ib tug ntawm cov nqe lus nyob rau hauv cov mis ces disappears. Tam sim no peb yuav tsum tau saib lub sij hawm, uas tuav lub pob nyob rau hauv cov huab cua ua ntej lub sib tsoo nrog rau hauv av.

Rau no peb yuav tsum tau qhov kev ncua deb mis nrog cov neeg kho tshuab zog. Ua ntej ntawm tag nrho cov tshem tawm cov khoom ntawm tus thawj ceev thaum lub sij hawm ntawm lub zog, vim nws yog pes tsawg, thiab chaw pib lub khoom yuav ua ncaj rau zero. Tom ntej no, peb muab ob sab ntawm ob mus rau tau tshem ntawm cov zauv feem. Tam sim no peb muaj peev xwm qhia lub sij hawm square. Yuav kom qhov no ob zaug rau hauv lub deb faib los ntawm cov gravitational acceleration. Peb mam li cia li muaj coj lub square hauv paus ntawm qhov no qhia kom paub ntau npaum li cas lub sij hawm dhau ua ntej lub sib tsoo ntawm cov pob nrog rau hauv av. Tus seev cev ntawm tus xov tooj hauv paus Extract thiab tau kwv yees li 2,71 vib nas this. Tam sim no tus xov tooj yog pawg rau hauv cov mis ntawm lub instantaneous tshaj tawm. Peb tau kwv yees li 26.5 meters ib ob.

Nco ntsoov rau cov xib fwb thiab cov thwjtim yuav mus ib me ntsis rau lwm txoj kev. Kom tsis txhob tsis meej pem nyob rau hauv cov nuj nqis, nws yuav tsum tau mus piv rau qhov kawg mis. Qhov no yuav pab tau vim hais tias muaj yuav tsawg uas yuav muaj tau poob nyob rau hauv lawv cov lus teb, thiab tso cai rau lawv cov kev ua yuam kev. Nyob rau hauv cov ntaub ntawv no, peb yuav npaj mus raws li nram no: mus qhia cov mis nyob deb li cas lub sij hawm, tab sis tsis tau hloov tus xov tooj thiab tus no qhia nyob rau hauv cov mis muaj cov instantaneous tshaj tawm. Ces nws ntsia raws li nram no: V = g * sqrt (2s / g). Tab sis lub acceleration ntawm lub ntiajteb txawj nqus yuav ua rau cov radical qhia. Ua li no, nws yuav nthuav nyob rau hauv lub square. Peb tau V = sqrt (2s * g ^ 2 / g). Tam sim no peb yuav txo cov acceleration ntawm lub ntiajteb txawj nqus nyob rau hauv lub denominator thiab nyob rau hauv lub numerator lwv nws degree. Raws li ib tug tshwm sim, peb tau V = sqrt (2gS). Cov lus teb yuav tsum yog tib yam, tsuas yog tus muab xam yuav tsawg dua.

Tau thiab xaus

Yog li ntawd, yuav muaj dab tsi peb kawm hnub no? Muaj ob peb seem uas yog kawm los ntawm physics. Neeg kho tshuab zog nws yog muab faib nws mus rau hauv statics, puab thiab kinematics. Txhua yam ntawm cov mini-Sciences nws muaj nws tus yam ntxwv, uas yog npaum li cas mus rau hauv tus account thaum daws teeb meem. Txawm li cas los, peb muaj peev xwm muab ib tug general cov yam ntxwv ntawm xws li ib tug lub tswv yim raws li cov neeg kho tshuab cov lus tsa suab. 10 chav kawm ntawv - lub feem ntau active txoj kev tshawb no ntawm no ceg ntawm physics, raws li lub tsev kawm ntawv cov ntaub ntawv kawm. Txhua yam kuj muaj xws li tus neeg mob ntawm free caij nplooj zeeg, raws li lawv muaj ib nrab views ntawm uniformly ceev tsab ntawv tsa suab. Thiab nrog cov teeb meem, peb ntiav yog kinematics.