Izifundo Eziyisisekelo Zefiziksi

Incazelo ye-capacitor yepuleti elihambisanayo

I-parallel plate capacitor iyi-capacitor equkethe amapuleti amabili omqhubi ahambisanayo, ipuleti ngalinye linendawo elinganayo ye-cross-section (A) kanye namapuleti amabili ahlukaniswe ibanga elithile (d), njengoba kuboniswe esithombeni esingakwesokunxele. Elinye lamapuleti omqhubi lishajwe kahle (+Q) kanti elinye ipuleti lomqhubi lishajwe kabi (-Q), lapho inani imali kagesi epuletini ngalinye kuyalingana. Ukuze ukushaja kungahambi ku-molecule yomoya, i-capacitor ihlukaniswe nendawo ezungezile, futhi phakathi kwala mapuleti amabili, kukhona i-vacuum.

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Isihloko mayelana Umthetho kaKepler

Usazikhumbula yini izinkumbulo zokugibela imoto okokuqala? Uma usemotweni ehambayo, ubona sengathi isihlahla noma isakhiwo siyahamba. Ngaleso sikhathi, ungase ucabange ukuthi izihlahla noma izakhiwo ziyahamba, kuyilapho wena nemoto niphumule. Eqinisweni, wena nemoto niyahamba, kuyilapho izihlahla noma izakhiwo ziphumule. Lokhu okuhlangenwe nakho kokunyakaza kwamanga empeleni kwenzeka nsuku zonke. Njalo ekuseni, “ilanga liyaphuma” emkhathizwe osempumalanga bese liya entshonalanga bese “lishona” emkhathizwe osentshonalanga ntambama.

Ngokufanayo, ebusuku, uvame ukubona inyanga isuka empumalanga iye entshonalanga. Wake wacabanga noma waqagela ukuthi ilanga nenyanga kuhambahamba emhlabeni, kuyilapho umhlaba uphumule?

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Isihloko mayelana ne-Moment of Force

1. Ingalo yelever

Buyekeza into ejikelezayo, njengomnyango wegumbi. Uma umnyango uvuliwe noma uvaliwe, umnyango uyajikeleza. Amahinji axhumanisa umnyango nodonga asebenza njenge-axis yokujikeleza.

Isithombe somnyango sibonakala ngenhla. Buyekeza isibonelo lapho umnyango ucindezelwa khona ngamandla amabili afanayo anobukhulu kanye nesiqondiso esifanayo, lapho isiqondiso samandla siqonde ngqo emnyango. Ekuqaleni, umnyango ucindezelwa ngamandla ka-F₁, r₁ kusukela ku-axis yokujikeleza. Ngemva kwalokho, umnyango ucindezelwa ngamandla ka-F₂, r₂ kude ne-axis yokujikeleza. Nakuba ubukhulu kanye nesiqondiso samandla F₁ =F₂, amandla ka-F₂ kubangela ukuthi umnyango ujikeleze ngokushesha kunamandla ka-F₁Ngamanye amazwi, amandla ka-F₂ kubangela ukusheshisa okukhulu kwe-angular uma kuqhathaniswa namandla ka-F₁Ungakufakazela lokhu.

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Isihloko mayelana nomthetho wesibili kaNewton mayelana nokunyakaza kokujikeleza

4.1 Ubudlelwano phakathi kwesikhathi samandla, isikhathi sokungaqhubeki kahle, kanye nokusheshisa kwe-angular

Uma kukhona amandla aphumayo (ΣF) asebenza entweni enesisindo (m) khona-ke into ihamba ngokuhambisana nokusheshisa okuthile (a). Ubudlelwano phakathi kwamandla aphumayo, isisindo, kanye ukusheshisa kuvezwa yi-equation:

ΣF = ma

Lesi yisibalo se- Newtonumthetho wesibili.

Inani lokunyakaza okujikelezayo okufana namandla aphumayo (ΣF) ekuhambeni okuqondile liyisikhathi samandla esiphumayo (Στ). Inani lokunyakaza okujikelezayo okufana nobunzima (m) ekuhambeni okuqondile yizikhathi ze-inertia (I). Inani lokunyakaza okujikelezayo okufana nokusheshisa (a) ekuhambeni okuqondile yi-angular acceleration (α).

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1. Incazelo ye maphakathi namandla adonsela phansi

Umzimba oqinile wakhiwe yizinhlayiya eziningi; ngakho-ke, amandla adonsela phansi asebenza kuzo zonke lezi zinhlayiya. Ngamanye amazwi, inhlayiya ngayinye inesisindo sayo. Isikhungo samandla adonsela phansi sento yiphuzu entweni lapho isisindo sazo zonke izingxenye zento sibhekwa njengesiphakathi kuleyo ndawo.

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Isihloko mayelana nezinhlobo zokulingana kwe umzimba oqinile

Akuzona zonke izinto esizithola ekuphileni kwansuku zonke ezihlala ziphumula. Mhlawumbe ekuqaleni into iyaphumula, kodwa uma ishukunyiswa (isibonelo ngumoya) izinto zingashukuma. Inkinga iwukuthi, noma ngabe ngemva kokuhamba, izinto zibuyela endaweni yazo yokuqala noma cha. Lokhu kuncike ohlotsheni lokulinganisela kwento. Ngemva kokuhamba, kuzoba namathuba amathathu, okungukuthi:

(1) into ibuyela endaweni yayo yokuqala,

(2) into isuka endaweni yayo yokuqala,

(3) into ihlala isendaweni yayo entsha.

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Isihloko mayelana nokulingana komzimba oqinile

1. Isimo sokuqala

Umthetho Wesibili KaNewton ithi uma amandla aphumayo entweni (into ebhekwa njengenhlayiya eyodwa) engekho u-zero,

khona-ke into izohamba ngokusheshisa okuqhubekayo, lapho isiqondiso sokunyakaza kwento = isiqondiso samandla aphelele. Uma amandla aphumelayo engu-zero, khona-ke into iphumule noma ihamba ngesivinini esingaguquki.

ΣF = ma

Uma into iphumule noma ihamba ngesivinini esingaguquki, into ayinayo i-acceleration (a). Ngenxa yokuthi i-acceleration (a) = 0, i-equation engenhla ishintsha ibe yi:

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Isihloko mayelana Iziphethu zilandelana futhi zihambisana

1. Iziphethu ochungechungeni

Uma intwasahlobo ixhunywe ngochungechunge, njengasesithombeni ohlangothini, khona-ke:

1. Ukwanda kobude bentwasahlobo = ukwanda kobude 1 + ukwanda kobude 2

Δy = Δy₁ + Δy₁

2. Amandla atholakala entwasahlobo elinganayo = amandla atholakala entwasahlobo 1 = amandla atholakala entwasahlobo 2

F_s =F₁ =F₂

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1. Umthetho kaHooke weziphethu

Uma intwasahlobo idonswa ngakwesokudla, intwasahlobo izonwebeka futhi ikhule ngobude (isithombe 1). Uma amandla okudonsa engekho makhulu, kutholakala ukuthi ukwanda kobude bentwasahlobo (Δx) kuyalingana nobukhulu bamandla okudonsa (F). Ngamanye amazwi, lapho amandla okudonsa emakhulu, ubude bentwasahlobo bukhulu. Ukuqhathaniswa kobukhulu bamandla okudonsa (F) kanye nokwanda kobude bentwasahlobo (Δx) kuyaguquguquka.

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Incazelo yomthetho ka-Ohm

Cishe kuzo zonke iziqhubi zensimbi, insimu kagesi ilingana nobuningi bomsinga kagesi, lapho isilinganiso sensimu kagesi nobuningi bomsinga kagesi sihlala njalo. Kuvezwa ngokwezibalo nge-equation:

ρ = E / J

E = inkambu kagesi, ρ = ukuphikiswa, J = ukuminyana kwamanje

I-ρ engaguquki ibizwa ngokuthi i-resistivity, enenani elingaguquki futhi ayixhomekile ensimini kagesi ebangela ugesi.

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