Ubuningi obubonakalayo Amayunithi Ubukhulu - Izinkinga Nezixazululo

Ubuningi obubonakalayo Amayunithi Ubukhulu - Izinkinga Nezixazululo

1.

Ubuningi obuphathekayo, amayunithi, ubukhulu - izinkinga nezixazululo 1

Ngokusekelwe kuthebula elingenhla, ukuthi yimaphi amanani anamayunithi angempela kanye nobukhulu.

Isixazululo:

1) Umfutho

Isibalo somfutho singu-p = mv

p = umfutho, m = isisindo , v = ijubane

Ubukhulu besisindo = M kanye nobukhulu bejubane = L/T = LT -1 ukuze ubukhulu besivinini = MLT -1

Iyunithi yomhlaba wonke yomfutho = kg m/s = kg ms -1

2) Amandla

Isibalo samandla yi-F = ma

F = amandla, m = isisindo , a = ukusheshisa

Ubukhulu besisindo = M kanye nobukhulu bokusheshisa = L/T 2 = LT -2 ngakho ubukhulu bamandla yi -MLT -2

Iyunithi yamandla yamazwe ngamazwe yi-kg m/s 2 = kg ms -2

3) Amandla

Isibalo samandla yi-W = F d

W = umsebenzi, F = amandla, d = ukufuduka

Ubukhulu bamandla = MLT -2 kanye nobukhulu bokufuduka bungu -L ngakho ubukhulu bomsebenzi bungu- [M][L][T] -2 [L] = [M][L] 2 [T] -2

Isibalo samandla yi-P = W/t

P = amandla, W = umsebenzi, t = isikhathi

Ubukhulu bomsebenzi = [M][L] 2 [T] -2 kanye nobukhulu besikhathi = [T] ukuze ubukhulu bamandla = [M][L] 2 [T] -2 / [T] = [M][L] 2 [T] -2 [T] -1 = [M][L] 2 [T] -3

Iyunithi yamandla yamazwe ngamazwe yi-kg m 2 /s 3 = kg m 2 s -3

2. Ngokusekelwe kuthebula elingezansi, amanani anamayunithi nobukhulu obufanele….

Ubuningi obuphathekayo, amayunithi, ubukhulu - izinkinga nezixazululo 1

Isixazululo:

Isibalo somfutho singu- p = mv.

Iyunithi yesisindo (m) yikhilogramu (kg) kanti iyunithi yejubane (v) yimitha ngomzuzwana (m/s) ukuze iyunithi yesivinini ibe yi -kg m/s noma i-kg m/s . Ikhilogramu ubukhulu besisindo obunobukhulu be-[M], imitha iyiyunithi yobude obunobukhulu be-[L], okwesibili yiyunithi yesikhathi enobukhulu be-[T] ukuze ubukhulu besivinini bube yi- [M][L]/[T] noma i-[M][L][T] -1.

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Isibalo samandla yi- F = ma.

Iyunithi yesisindo (m) iyi-kilogram (kg) kanti iyunithi yokusheshisa (a) ingamamitha ngomzuzwana oyisikwele (m/s 2 ) ngakho iyunithi yamandla iyi- kg m/s 2 noma i-kg ms -2 . Iyunithi yesisindo iyi-kilogram enobukhulu be-[M], iyunithi yobude iyi-mitha enobukhulu be-[L], iyunithi yesikhathi ingeyesibili enobukhulu be-[T] ngakho ubukhulu bamandla buyi- [M][L]/[T] 2 noma i-[M][L][T] -2

Isibalo samandla yi -P = W/t , isibalo somsebenzi yi-W = F s, isibalo samandla yi-F = m a.

Iyunithi yobunzima iyi-kilogram (kg), iyunithi yokusheshisa ingamamitha ngomzuzwana isikwele (m/s 2 ) ukuze iyunithi yamandla ibe yi-kg m/s 2. Iyunithi yokufuduka iyi-meter (m), iyunithi yamandla yi-kg m/s 2 ukuze iyunithi yomsebenzi ibe yi-kg m/s 2 xm = kg m 2 /s 2. Iyunithi yesikhathi iyisekhondi (s), iyunithi yomsebenzi yi-kg m 2 /s 2 ukuze iyunithi yamandla ibe yi-kg m 2 /s 2 : s = kg m 2 /s 3 noma kg m 2 s -3.

Iyunithi yobunzima iyikhilogramu enobukhulu buka-[M], iyunithi yobude iyimitha enobukhulu buka-[L], iyunithi yesikhathi ingeyesibili enobukhulu buka-[T] ukuze ubukhulu bamandla bube [M][L] 2 /[T] 3 noma [M][L] 2 [T] -3.

3. Amandla anqunywa njengesilinganiso lapho umsebenzi wenziwa khona. Noma amandla isilinganiso somsebenzi nesikhathi esinqunyiwe. Nquma ubukhulu bamandla.

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Isixazululo:

Isibalo samandla:

Ubuningi obubonakalayo, amayunithi, izinkinga zobukhulu 3

W = umsebenzi, F = amandla, a = ukusheshisa, v = ijubane, d = ibanga, t = isikhawu sesikhathi

m = isisindo ( ubukhulu besisindo = M), d = ibanga ( ubukhulu bebanga = L), t = isikhathi ( ubukhulu besikhathi = T).

Ubukhulu bamandla:

Ubuningi obuphathekayo, amayunithi, ubukhulu - izinkinga nezixazululo 4

  1. Iyini inani elibonakalayo?
    • Impendulo: Inani elibonakalayo liyimpahla yento noma uhlelo olungalinganiswa futhi lulinganiswe. Izibonelo zifaka phakathi isisindo, ubude, isikhathi, izinga lokushisa, kanye namandla.
  2. Kungani amayunithi ebalulekile ekulinganisweni kobuningi obubonakalayo?
    • Impendulo: Amayunithi anikeza indlela ejwayelekile yokuveza ubukhulu benani elibonakalayo. Aqinisekisa ukucaca, ukunemba, kanye nokuvumelana kwezilinganiso, okwenza kube lula ukuxhumana nokuqondana okucacile phakathi kososayensi nonjiniyela emhlabeni jikelele.
  3. Uyini umehluko phakathi kwenani eliyisisekelo (noma eliyisisekelo) kanye nenani elithathwe?
    • Impendulo: Ubuningi obuyisisekelo buyinani eliyisisekelo elibonakalayo elinqunywa ngokuzimela futhi lakha isisekelo sezinye izilinganiso. Izibonelo zifaka phakathi ubude, isisindo, nesikhathi. Ubuningi obutholakalayo bakhiwa ngokuhlanganiswa kwala manani ayisisekelo, njengendawo (ubude x ububanzi) noma ijubane (ibanga/isikhathi).
  4. Ziyini izilinganiso? Zihlobana kanjani nobuningi obuphathekayo?
    • Impendulo: Ubukhulu bubhekisela kuhlobo kanye nohlobo lobuningi obuphathekayo (isb., [L] ngobude, [M] ngobuningi, [T] ngesikhathi). Bamelela amandla lapho inani eliyisisekelo liphakanyiswa khona ukuze limelele inani elithile eliphathekayo.
  5. Kusho ukuthini "ifomula yobukhulu" yobuningi obungokoqobo?
    • Impendulo: Ifomula enobukhulu iveza ubudlelwano benani elibonakalayo ngokwezilinganiso zalo eziyisisekelo. Isibonelo, ifomula enobukhulu yejubane , okubonisa ukuthi ijubane lisuselwa kubude ([L]) obuhlukaniswe ngesikhathi ([T]).
  6. Uhlelo lwe-SI (International System of Units) lubaluleke kanjani kwisayensi yanamuhla kanye nobunjiniyela?
    • Impendulo: Uhlelo lwe-SI luhlinzeka ngesethi yamayunithi ajwayelekile amukelwa emhlabeni wonke yokulinganisa ubungako obubonakalayo. Lokhu kuqinisekisa ukufana, kunciphisa ukudideka, futhi kwenza kube nokubambisana phakathi kososayensi nonjiniyela emhlabeni jikelele.
  7. Uyini umehluko phakathi kwe-scalar kanye nenani le-vector?
    • Impendulo: Inani le-scalar linobukhulu kuphela (isb., isisindo, izinga lokushisa), kanti inani le-vector linobukhulu kanye nesiqondiso (isb., ijubane, amandla).
  8. Kungani singenakusebenzisa amayunithi angahleliwe ukukala ubuningi obungokoqobo?
    • Impendulo: Ukusebenzisa amayunithi angahleliwe kungaholela ekudidekeni, ukuntuleka kokuvumelana, kanye nokungaxhumani kahle ezilinganisweni zesayensi kanye nezibalo. Amayunithi ajwayelekile aqinisekisa ukuthi izilinganiso ziqondwa yiwo wonke umuntu futhi ziqhathaniswa.
  9. Ukuhlaziywa kobukhulu kungaba kanjani usizo ku-physics?
    • Impendulo: Ukuhlaziywa kobukhulu kusiza ukuqinisekisa ukunemba kwezibalo zomzimba ngokuhlola ukuvumelana kobukhulu kuzo zombili izinhlangothi zesibalo. Kungasetshenziswa futhi ukuthola ubudlelwano phakathi kobuningi obuhlukahlukene bomzimba.
  10. Kungani amanye amanani, njenge-refractive index noma i-coefficient of friction, ebhekwa njengengenakulinganiswa?
  • Impendulo: Ubuningi obungenakulinganiswa buyizilinganiso zobuningi obufanayo, ngakho-ke ubukhulu babo buyaphela. Isibonelo, inkomba yokubheka emuva iyisilinganiso sejubane lokukhanya endaweni engenalutho nesivinini sayo endaweni ephakathi. Njengoba zombili ziyijubane, ubukhulu bazo buyaphela, okwenza inkomba yokubheka emuva ingabi nakulinganiswa.
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