Kukweshera - ichi ndechimwe chezvinhu zvinokosha Dzidziso simba. Chii chaunoziva nezvake?

Mumakore ake kuchikoro, mugiredhi rechinomwe kana kuti rechisere, mumwe murume aiziva mutsva pfungwa guru wefizikisi - kukweshera. Asi vazhinji, sezvo vakuru, kukanganwa kuti kukweshera kwakadaro uye sei simba iri mabasa. Ngatiedzei kunzwisisa nyaya iyi.

The tsananguro

Kukweshera - kutanga kuti unosanganisira zvinotevera zvirevo: Kana mitumbi miviri uchikurukura mumwe panguva kunyorerana anoumba munhu kukurukurirana chaiyo kunodzivisa miviri achifambirana hama kune mumwe. Zviri pachena, tinogona ngaaverenge kukosha kubata kwemiviri izvi. The frictional simba chete pashure ichi maitiro uye kunozivisa quantitatively. Kana kukweshera kunoitika pakati miviri yakasimba (semuenzaniso, kubata bhuku ane bhuku pasherefu kana tafura apple), ipapo akadaro kukurukurirana inonzi yakaoma kukweshera.

Zvinofanira kunzwisiswa kuti kukweshera - ndiye simba remagetsi hunhu. Izvi zvinoreva kuti mhaka iyi ndiyo mauto kudyidzana pakati zvacho zvinoumba imwe muviri.

Chii kukweshera?

Nokuda siyana huripo munyika yedu zvinhu, unogona kuona kuti mumwe nomumwe wavo ane yayo marongerwo uye ane mumwe zvivako. Izvi zvinoreva kuti kudyidzana pakati vanotongwa dzakasiyana vachava zvakasiyana. Nokuti kunzwisisa zvakarurama chaizvo uye nomazvo chichapedza matambudziko akawanda wefizikisi riri conventionally kamura mhando nhatu kukweshera. Saka, isu kutsanangura chimwe nechimwe pacho choga,

• The kukweshera rokutanga - kukweshera iyi zororo, kunoitika apo pasina hama kufamba kwemiviri maviri. Tinogona kuona mienzaniso kwayo kwose kwose, nokuti simba kunotangira kukweshera ichi, akachengeta zvinhu mwero. Somuenzaniso, zvinhu nezvekubva conveyor bhandi, mbambo nomuzvanza parusvingo, kana munhu akamira pasi.
• Zvishoma nezvishoma mumatope kukweshera - CONDITIONAL wechipiri kukweshera. Pitikoti ukoshi Akatsunga kuitira kuti kana muviri apo iri zvakanyatsoenzana, simba rinoshandiswa kuti mukuru kupfuura simba kunofambira mberi kukweshera, simba anotanga kuita zvishoma nezvishoma mumatope kukweshera, uye muviri yakatamira kubva panzvimbo.
• Pakupedzisira, rinopfungaira kukweshera vachitsanangura kubata zviri zviviri, mumwe icho akakungurutsa pamusoro pemvura mumwe. Musiyano iri rinopfungaira kukweshera uye zvishoma nezvishoma mumatope nokuti kuti chipi kwebasa nzvimbo nomuviri misha pamwe nokureba kuonana pamusoro, uye pachinzvimbo akaputsa zvisungo zvitsva intermolecular vari aumba. Uye panyaya apo vhiri mabhanzi pasina rwotedzemuka, samolecular zvisungo pamwe vhiri vachasimudza migove kuputswa zvikuru kudarika kana zvishoma nezvishoma mumatope. Zvakaratidza kuti simba rinopfungaira kukweshera idukusa zvishoma nezvishoma mumatope mauto.

Kupi uye sei unogona kushandisa kukweshera?

Kukweshera - ndiye zvinokosha chakajairika, pasina izvo isu hatingavatengeri kuita zvinhu: kufamba, kugara kana chete kuchengeta zvinhu mumaoko avo. Saka regai kurerutsa kukosha kukweshera. Mune mashoko yefizikisi French Guillaume: "Musatya kukweshera, pasi redu kwaizova pasina chero roughness, zvingava akaita sedonhwe emura."

Zvichida yakanakisisa muenzaniso kuti vakawanda zvakarurama anorondedzera kukweshera - ndiro basa pamakuyo. Kunyange kare zvakanga akacherechedza kuti mauto tikaisa kukweshera iri shoma zvikuru pane zvishoma nezvishoma mumatope kukweshera mauto. It chinhu chisingarambiki abatsire rinopfungaira kukweshera chaiva chikonzero, kuti vanhu vakatanga kuisa danda kana rollers kutama rinorema uye oversized zvinhu. Nokufamba kwenguva, vanhu kuvandudza ruzivo rwavo pamusoro zvinoshamisa ehupfumi kuti tikaisa kukweshera, vaichengeta kufamba zvinhu pasi pokudzora frictional vehondo, uye pakupedzisira akazogadzira vhiri! Munyika yanhasi hazvibviri kufungidzira upenyu pasina zvinokosha zvikamu izvi, nekuti mavhiri - ichi ndicho "injini" wechipiri chero motokari!

How kuverenga kukosha kukweshera simba?

Sezvinongoita mimwe simba, simba kukweshera ane integer tsika. Kuti zvakarurama kuona sei simba zvikuru kunodiwa kutama kana mamwe marudzi basa, zvakakodzera ngaaverenge simba kunofambira mberi kukweshera. Izvi Zvinowanzosanganisirawo mainjiniya, apo Somuenzaniso, kuvaka mafekitari, kana kugadzira mano itsva. Zvisinei, kunyange vanhuwo vadzidzi vanosangana zvinoverengeka, apo uchida kuverenga kukweshera simba. Saka, kuverenga kukosha kwayo, unongofanira kuva kushandisa nyore inonyatsoita: F _kukweshera = K * N, apo k - ndiye coefficient kuti kukweshera. Zvinoreva coefficients zvose kunobva nguva dzose pamusoro pemvura chinhu, izvo zvinofamba nenzira kana interacts nomuviri. "N" pamusoro nomuviri payakavakirwa wedu pasi kuita simba. Zvinoenderana achinyanya muviri uremu, riri kubatana rubatsiro pamusoro.

We ngaaverenge kukosha simba iri dambudziko

Tambira M = muviri kurema 3 makirogiramu riri chinjikira purangazve. The coefficient pamusoro kukweshera pakati pehuni bhodhi uye muviri 0.3. Sei kuwana kukosha simba kukweshera? Very nyore, chete anofanira kutsiva tsika dzedu nzira. Chete zvakafanira kufunga kuti iyi nyaya N akaenzana uremu muviri (mutemo 3rd Newton wacho). Saka, zvinodiwa simba akaenzana (m * g) * k = ( 3 * 10 makirogiramu M / s ²⁾ * 0.3 = 9 H.