Ukulondolozwa komfutho oqondile
Umthetho wokulondolozwa komfutho oqondile uthi uma kungekho mandla angaphandle asebenza ezintweni ezimbili ezishayisanayo, umfutho wezinto ngaphambi kokushayisana ulingana nomfutho wezinto ngemva kokushayisana.
p 1 + p 2 = p 1 ' + p 2 ' ………………….. Isibalo 1.4
m 1 v 1 + m 2 v 2 = m 1 v 1 ' + m 2 v 2 '
Uma ngemuva kokushayisana zombili izinto zinamathelana,
m 1 v 1 + m 2 v 2 = (m 1 + m 2 ) v'
lapho: m 1 = isisindo sento 1, m 2 = isisindo sento 2, v 1 = isivinini sento 1 ngaphambi kokushayisana, v 2 = isivinini sento 2 ngaphambi kokushayisana, v 1 ' = isivinini sento 1 ngemva kokushayisana, v 2 ' = isivinini sento 2 ngemva kokushayisana, v' = isivinini sezinto zombili ngemva kokushayisana
U-v noma u-v' unesibonakaliso esihle uma into ihamba iye kwesokudla futhi unesibonakaliso esibi uma into ihamba iye kwesobunxele. Uma iziqondiso zokuhamba kwezinto zingaziwa, kodwa zombili izinto zihamba ngezindlela eziphambene, noma iyiphi ka-v noma u-v' inesibonakaliso esihle kanti enye inesibonakaliso esibi. Uma zombili izinto zihamba ngendlela efanayo, u-v noma u-v' wazo zombili izinto unesiqondiso esifanayo. Uphawu oluhle noma olubi lubonisa indlela yokuhamba kwezinto.
Imibuzo nezimpendulo ezingu-20 eziphathelene nokulondolozwa komfutho oqondile:
1. Umbuzo: Kuyini umfutho oqondile? Impendulo: Umfutho oqondile, ovame ukubizwa ngokuthi umfutho, uwumkhiqizo wobukhulu bento kanye nesivinini sayo. Uyinani levektha futhi umelelwa ngu -�= .
2. Umbuzo: Ukulondolozwa komfutho oqondile kusebenza kanjani ekushayisaneni? Impendulo: Umfutho ophelele wesistimu ngaphambi kokushayisana ulingana nomfutho ophelele ngemva kokushayisana, uma nje kungekho mandla angaphandle asebenzayo ohlelweni.
3. Umbuzo: Kukuziphi izimo lapho umfutho oqondile ulondolozwa khona? Impendulo: Umfutho oqondile ulondolozwa kuzo zonke izimo lapho amandla angaphandle aphelele ohlelweni engo-zero.
4. Umbuzo: Irokhethi esemkhathini iya phambili kanjani njengoba kungekho mandla angaphandle asebenzayo kuyo? Impendulo: Irokhethi esemkhathini ixosha amagesi emuva, futhi ngenxa yokulondolozwa komfutho, irokhethi iya phambili. Umfutho wamagesi akhishwayo kanye nerokhethi kuhlala kufana futhi kuphambene, kugcina umfutho ophelele ongu-zero.
5. Umbuzo: Kungani umuntu oshwiba eqhweni ejikeleza ngokushesha uma edonsa izingalo zakhe? Impendulo: Uma umuntu oshwiba edonsa izingalo zakhe, unciphisa isikhathi sakhe sokungagxili. Ukuze alondoloze umfutho we-angular, ijubane lakhe lokujikeleza kumele lande.
6. Umbuzo: Ingabe umfutho ungalondolozwa uma kukhona amandla angaphandle asebenza ohlelweni? Impendulo: Ngesikhathi sokusebenza kwamandla angaphandle, umfutho ngeke ulondolozwe. Kodwa-ke, ngezikhathi ezimfushane, ushintsho lungase lube luncane futhi umfutho cishe ulondolozwe.
7. Umbuzo: Kuyini ukungqubuzana kwe-inelastic maqondana nomfutho? Impendulo: Ekungqubuzaneni kwe-inelastic, umfutho uyalondolozwa, kodwa amandla e-kinetic awalondolozwa. Izinto zinganamathelana noma ziguquguquke ngesikhathi sokungqubuzana.
8. Umbuzo: Uhlelo lungathuthuka kanjani ngaphandle kwamandla angaphandle? Impendulo: Uhlelo alukwazi ukukhula ngaphandle kwamandla angaphandle. Umthetho wesithathu kaNewton uqinisekisa ukuthi izenzo ngaphakathi kohlelo zinezimpendulo ezilinganayo neziphambene, ngakho-ke umfutho ophelele awushintshi.
9. Umbuzo: Kuyini ukushukuma kanye nobudlelwano bako nomfutho? Impendulo: Ukushukuma ushintsho kumfutho wento. Kunikezwa ngumkhiqizo wamandla asebenza entweni kanye nesikhathi esebenza ngaso. Ukushukuma nakho kuyinani le-vector.
10. Umbuzo: Ama-airbag ezimotweni asebenzisa kanjani umqondo we-momentum? Impendulo: Ama-airbag andisa isikhathi lapho kwenzeka khona ingozi. Lokhu kunciphisa amandla abhekene nabagibeli, kushintsha umfutho kancane kancane futhi kunciphisa ukulimala.
11. Umbuzo: Ukugxumagxuma kuhluke kanjani ekunamatheleni ngokwemigomo yokulondolozwa komfutho ekushayisaneni? Impendulo: Kuzo zombili izimo, umfutho uyalondolozwa. Kodwa-ke, lapho izinto zigxumagxuma, zingase zishintshane ngamandla e-kinetic amaningi kunalapho zinamathelana.
12. Umbuzo: Ingabe into eyodwa ingaba nomfutho ogciniwe? Impendulo: Umfutho wento ehlukanisiwe uyagcinwa ngaphandle kokuthi usetshenziswe amandla angaphandle.
13. Umbuzo: Umfutho uhlobene kanjani nomthetho wesithathu kaNewton? Impendulo: Umthetho wesithathu kaNewton uthi isenzo ngasinye sinokusabela okulinganayo nokuphambene. Lokhu kuqinisekisa ukuthi izinguquko zomfutho ziyalinganiswa phakathi kwezinto ezisebenzisanayo, okuholela ekulondolozweni komfutho.
14. Umbuzo: Kungani inhlamvu edutshulwa esibhamini yenza isibhamu sibuyele emuva? Impendulo: Njengoba inhlamvu ithola umfutho oqhubekayo, isibhamu sithola umfutho olinganayo obuyela emuva ngenxa yokulondolozwa komfutho.
15. Umbuzo: Ingabe umfutho ungaba u-zero ohlelweni olunezinto ezihambayo? Impendulo: Yebo, uma isamba sevektha sazo zonke izikhathi ngazinye singu-zero. Isibonelo, izinto ezimbili ezinobunzima obulinganayo kanye nesivinini ezihamba ngezindlela eziphambene azinawo umfutho ophelele.
16. Umbuzo: Isikhungo sokunyakaza kwesisindo sihlobene kanjani nokulondolozwa kwesivinini? Impendulo: Ukunyakaza kwesikhungo sokunyakaza kwesistimu kuhlobene ngqo nomfutho wesistimu. Uma kungekho mandla angaphandle asebenzayo, isikhungo sokunyakaza sizohamba ngesivinini esingaguquki.
17. Umbuzo: Ingabe umfutho uhlala ulondolozwa ekuqhumeni? Impendulo: Yebo, umfutho ophelele ngaphambi kokuqhuma (ngokuvamile u-zero) ulingana nomfutho ophelele ngemva kwalokho, yize izingcezu zingase zihambe ngezindlela ezahlukene.
18. Umbuzo: Abadlali be-pool basebenzisa kanjani izimiso zokonga amandla? Impendulo: Lapho beshaya amabhola e-pool, abadlali balindela ukuthi amabhola azohamba kanjani ngemva kokushayisana ngokusekelwe ekulondolozeni amandla, okubavumela ukuthi babikezele imiphumela yokudubula.
19. Umbuzo: Kungani imoto ingami ngokushesha ngemva kokucima injini? Impendulo: Ngenxa yomfutho wayo. Ngaphandle kokuthi isetshenziswe amandla angaphandle (njengokungqubuzana), izoqhubeka nokuhamba.
20. Umbuzo: Ohlelweni lwezinto ezimbili, uma umfutho wento eyodwa ukhuphuka, kwenzekani kumfutho wento enye? Impendulo: Umfutho wento enye uzoncipha ngenani elilinganayo ngakolunye uhlangothi, kugcinwe umfutho ophelele.
Ukuqonda ukulondolozwa komfutho oqondile kuyisisekelo ku-physics futhi kunezinhlelo zokusebenza ezisukela ku-mechanics eziyisisekelo kuya emikhakheni ethuthukile yokufunda.
