Mphamvu: Kodi anayeza ntchito, tikutsata ndondomeko za kuwerengetsa

mphamvu ndi mphamvu ndi chiyani? Kodi ife kuyeza, ntchito zimene zipangizo ndi mmene otchulidwa mfundo thupi ndi muyika mumachitidwe, tiona kenako m'nkhani ino.

mphamvu

dziko ndi chikhalidwe za thupi amayamba adutsa mphamvu. Pamene zotsatira zake, ndi thupi kulumikizidwa kapena zosiyana malangizo kuyenda, amagwira ntchito. Choncho, mu thupi zingamvekere mphamvu iliyonse.

Choncho, njinga akuyamba akuyenderera munthu mwendo mphamvu ndi kuphunzitsa mphamvu ya magetsi sitima samatha. kuchita chimodzimodzi amapezeka ndi gulu iliyonse. The ntchito mphamvu - ndi phindu limene kuchulukitsa ndi gawo mphamvu gawo musunthe ake a ntchito ndi cosine ya njingayo pakati pa zamoyo zina zizindikiro izi. Dongosolo mu nkhani iyi ndi iyi:

A = F · S · Ko (F, s)

Ngati njingayo pakati pa zamoyo zina izi si ziro, opaleshoni nthawi zonse anachita. Pankhaniyi akhoza kukhala zabwino ndi zoipa. Pa thupi izo sadzawaumiriza kuchita makona 90 °.

Taganizirani mwachitsanzo ngolo kukokedwa ndi mphamvu akavalo akulu. M'mawu ena, ntchito akupanga adaponya malangizo a gulu la ngolo lapansi. Koma mphamvu yake yokoka, kunsi kapena perpendicular kuti, ntchito si (by njira, ndiyamphamvu - chimaonekera ndi zimene mphamvu injini).

Anthu ogwira ntchito ndi kuchuluka scalar ndi amayezedwa joules. Zimakhala:

• ndi chotsatira (atadziŵa magulu angapo);
• wosakhazikika (ndiye mawerengedwe wapangidwa ndi yofunika).

mphamvu

Kodi kuyeza mtengo uwu? Kuyamba disassemble, kuti chimaimira. Iwo ankadziwa kuti kayendedwe ka thupi imayamba chifukwa mphamvu, adachita ntchito makina. Komabe, mu kuchita, powonjezera, m'pofunika kudziwa mmene timachitira.

Ntchito zikhoza kutha nthawi zosiyana. Mwachitsanzo, zotsatira womwewo ukhoza kupanga galimoto yaing'ono kapena yaikulu magetsi galimoto. Funso yekha, yayitali bwanji yomwe idzafunike kupangidwa. Phindu kuti ali ndi udindo ntchito - ndi mphamvu. Kodi izo chimaonekera, n'zoonekeratu kwa tanthawuzo - ndi chiŵerengero cha ntchito kwa nthawi yeniyeni kufunika kwake:

N = A / Δt.

Ndi ntchito zomveka tinafika aone kuti pali zotsatirazi:

N = F · vesi,

ndi mankhwala a mphamvu zamoyo zina pa liwiro - ndipo ali ndi mphamvu. Kodi womwewo? Malinga ndi dongosolo SI, mtengo uwu ndi gulu la muyeso wa 1 Watt.

Watt ndi mayunitsi ena mphamvu

Watt ndi mphamvu amapangidwa ndi ntchito wachiwiri joule a. Wotsirizayo dzina lake polemekeza ndi England Dzh.Uatta amene anatulukira ndipo anamanga woyamba injini nthunzi. Koma potero anagwiritsa ntchito mtengo osiyana - ndiyamphamvu, kodi ntchito lero. ndiyamphamvu limodzi ndi pafupifupi wofanana 735,5 Watts.

Choncho, kuwonjezera Watt mphamvu amayezedwa ndiyamphamvu chinkafunika. Ndipo pa kwambiri zochepa ntchito monga Erg, wofanana khumi opanda mphamvu chiwiri Watt. N'zotheka ndi muyeso wa wagawo mmodzi wa misa / mphamvu / mamita pa chachiwiri, umene uli wofanana 9,81 Watts.

mphamvu Engine

Dzina lake Mtengo imodzi yofunika kwambiri galimoto iliyonse chimene chiri chosiyana kwambiri mphamvu. Mwachitsanzo, chometera chamagetsi ali hundredths ochepa a kilowatt, ndi m'mlengalenga roketi mu mamilioni.

Pakuti osiyanasiyana katundu afunikira mphamvu osiyana kupulumutsa liwiro zina. Mwachitsanzo, galimoto adzakhala ankawonjezereka ngati kuika katundu kwambiri. Ndiye mphamvu ya mikangano panjira kwambiri. Choncho, kukhala liwiro mofanana mu chikhalidwe yotsitsa, pamafunika mphamvu zambiri. Choncho, galimoto ndi kunyeketsa mafuta kwambiri. Zimenezi amadziwika kuti madalaivala onse.

Koma pa liwilo n'kofunika, ndi inertia ya makina, zomwe ndi mwachindunji njila kwa misa. madalaivala ozindikira amadziwa izi kupeza mfundo pamene galimoto kuphatikiza yabwino ya mafuta ndi liwiro chisamaliro mafuta zochepa.

mphamvu panopa

ndi apano mpandawo ndi mphamvu yotani? Mu unit womwewo wa dongosolo SI. Iwo angathe kuyeza ndi njira mwachindunji kapena mozungulira.

Yoyamba njira akuyendera ntchito mphamvu mita kudya mphamvu yokulirapo ndi katundu wolemera gwero la panopa. Ndi izo, kuchokera Watts khumi kapena kuposerapo. The njira mozungulira ntchito kuyeza mfundo zazing'ono ngati zofunika. Zipangizo izi ndi ammeter ndi voltmeter olumikizidwa kwa ogula. Chilinganizo Pankhaniyi adzakhala mawonekedwe:

P = U · I.

Ndi odziwika katundu kukana, kuyeza panopa likuyenderera mu izo ndi kupeza phindu mphamvu motere:

P = I ² ∙ R _N.

Malinga ndi chilinganizo P = I ² / R _N Angagwiritsidwenso vycheslit mphamvu panopa.

Kodi izo chimaonekera mu magetsi atatu gawo, nayenso, palibe chinsinsi. Kuchita izi, ntchito bwino chipangizo - mphamvu mita. Ndipo kuthetsa vuto kuposa anayeza mphamvu zamagetsi, mungagwiritse ntchito limodzi, awiri kapena atatu zipangizo. Mwachitsanzo, chifukwa zinayi kukhazikitsa chofunika zipangizo atatu. Pakuti atatu waya pa asymmetrical potsegula - awiri.