Sainzi

Zvinhu: Tsanangudzo yekupisa, kufambisa kupisa, kugona kupisa

Wakambonwa tii inotonhora, mukaka unotonhora, sirapu inotonhora, nezvimwewo here? Zvakanaka, pakugadzira tii inotonhora, tinowanzo sanganisa mvura inopisa kana inodziya mugirazi rine zvidimbu zvechando. Mvura inopisa kana mvura inodziya ine tembiricha yakakwira, nepo zvidimbu zvechando zvine tembiricha yakaderera. Mushure mekubata kwenguva yakati, musanganiswa wezvidimbu zvechando netii inopisa unoshanduka kuita tii inotonhora (musanganiswa wezvidimbu zvechando netii inodziya wasvika patembiricha yakaenzana). Maitiro akafanana anoitika patinosanganisa mvura inopisa nemvura inotonhora. Mushure mekubata, mvura inopisa nemvura inotonhora inoshanduka kuita mvura inodziya (musanganiswa wemvura inopisa nemvura inotonhora wasvika patembiricha yakaenzana). Sei zvinhu izvi zvichigona kusvika patembiricha yakaenzana mushure mekubata?

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Zvinhu zviri pamusoro petsanangudzo yetembiricha, nzvimbo yechando, nzvimbo yekufashaira

Wakambobata chando here? Unonzwa sei kana ruoko rwako ruchibata chando kana ruoko rwako rukaiswa mufiriji? Ko kana chaunobata chiri moto? Paunobata chando, ruoko rwako runonzwa kutonhora, zvakasiyana kana ukabata moto, ruoko rwako runonzwa kupisa. Zvinorevei kupisa, kudziya, kutonhora, uye kutonhora?

Tsanangudzo yeTembiricha

Pfungwa yekupisa inobva mukunzwa kwekupisa nekutonhora kunoitika nekunzwisisa kwedu kubata. Zvichibva pane zvinoonekwa nekunzwisisa kwedu kubata, tinoti chimwe chinhu chinopisa kupfuura chimwe kana kutonhora kupfuura chimwe. Zvinhu zvinopisa zvine tembiricha yakakwira, nepo zvinhu zvinotonhora zvine tembiricha yakaderera. Kana chinhu chichitonhora, tembiricha yacho yakaderera. Kusiyana neizvi, kana chinhu chichipisa, tembiricha yacho yakakwira. Tembiricha ndiyo chiyero chekuti chinhu chinopisa kana kutonhora zvakadii.

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Kunzwisisa Tembiricha neKupisa

Kupisa . Pfungwa yekupisa inobva mukunzwa kupisa nekutonhora kunoitika nekunzwisisa kwedu kubata. Zvichibva pane zvinonzwa kunzwa kwedu kubata, tinoti chinhu chinopisa kupfuura chimwe chinhu kana chinhu chinotonhora kupfuura chimwe chinhu. Zvinhu zvinopisa zvine tembiricha yakakwira nepo zvinhu zvinotonhora zvine tembiricha yakaderera. Kana chinhu chikanyanya kutonhora, tembiricha yazvo yakaderera. Kusiyana neizvi, kana chinhu chikanyanya kupisa, tembiricha yazvo yakakwira. Kuyera uku kwekupisa kana kutonhora kwechinhu kunonzi tembiricha. Munyaya yedzidziso yekinetic yemagasi ichadzidzwa gare gare mugiredhi rechi11, uchanzwisisa zvakadzama zvinoreva tembiricha; zvinoitika kumamorekuru anoumba chinhu icho chinhu chinogona kunzwa kupisa, kudziya, kutonhora kana kutonhora.

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Tsanangudzo yemayuniti epasi rose

Sisitimu yeZvikamu

Semuenzaniso, kana ukayera hurefu hwako wohuti 100, mhedzisiro yacho haina zvainoreva. Saizvozvowo, kana ukayera huremu hwemuviri wako wohuti 20, mhedzisiro yacho haina zvainoreva uye hainzwisisiki kune vamwe. Kunze kwekutaura nhamba chaiyo kana chifananidzo, chiyero chinofanirawo kuperekedzwa nemayuniti. Kana ukati hurefu hwako mafathomu maviri, saka 2 inhamba yekuyera uye mafathomu ndiwo mauniti aunoshandisa. Vanhu vakajaira kushandisa mafathomu vanonzwisisa chiyero ichi. Kana, kana ukayera hurefu hwetafura yaunoshandisa mukirasi wohuti 5 spans, mhedzisiro yacho inonzwisisika kune vamwe vakashandisa spans seyuniti.

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Masisitimu akasiyana emayuniti

Tinogona kushandura mayuniti mukati meimwe sisitimu yemayuniti kuita imwe, senge kubva kuBritish System kuenda kuInternational System , kana zvinopesana. Semuenzaniso, kana tikayera kureba kwetafura tichishandisa ruler in inches (British System) uye tichida kuratidza kureba mumamita (International System), tinogona kushandura chiyero kubva kumainches kuenda kumamita. Kuchinja uku kunogona kuitwa uchishandisa conversion factor.

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Huwandu hunotorwa hunobva muhuwandu humwe chete kana kupfuura . Kuwedzera kune huwandu hunomwe hwepakutanga, humwe huwandu hwepanyama hunotorwawo.

Tafura yehuwandu, mafomula uye mayunitiNzvimbo inotorwa kubva muhuwandu huviri hwehurefu: kureba nehupamhi. Vhoriyamu inotorwa kubva muhuwandu hutatu hwehurefu: kureba, upamhi, nekukwirira. Kumhanya kunobva muhuwandu humwe hwehurefu (daro) nenguva imwe chete. Kukurumidza kunobva muhuwandu humwe hwehurefu (daro) nenguva mbiri. Kuwanda kunobva muhuwandu humwe hwehuremu nehukuru hutatu. Simba rinobva muhuwandu humwe hwehuremu, huwandu humwe hwehurefu, nehukuru huviri hwenguva.

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Kunzwisisa

Huwandu hwepakutanga huwandu hwezvinhu hune zvikamu zvakatongwa kare uye hazvibvi kune zvimwe zvinhu. Muna 1971, Musangano Mukuru weZviyero neZviyero wakagadza huwandu hwezvinhu zvinomwe sehuwandu hwezvinhu . Huwandu hwezvinhu zvinomwe (7), pamwe chete nezvikamu zvavo nehukuru hwazvo, zvinoratidzwa mutafura iri pazasi.

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2 Mienzaniso yemibvunzo yekuenzanisa muviri wakasimba

1. F₁ = 10 N, F₂ = 15 N uye F₄ = 10 N, ichishanda pabhuroko reABCD sezvakaratidzwa mumufananidzo. Kureba kwebhuroko reABCD mamita makumi maviri. Sarudza F₃ kuitira kuti bhokisi riri muchimiro che "static equilibrium". Usatarisa huremu hwebhokisi.
Kukurukurirana:

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Mienzaniso mina yeMatambudziko eFluid Continuity Equation

1. Chikamu chimwe chete chepombi chine dhayamita ye20 cm uye chimwe chikamu chine dhayamita ye10 cm. Kana mwero wekuyerera kwemvura muchikamu chikuru chepombi uri 30 cm/s, saka mwero wekuyerera kwemvura muchikamu chidiki chepombi ndewe...
A. 80 cm/s
B. 100 cm/s
C. 120 cm/s
D. 130 cm/s
E. 140 cm/s
Kukurukurirana:

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