Amafomula Amandla Okungqubuzana Okungaguquki kanye Ne-Kinetic
Ukungqubuzana kungamandla asebenza ngokumelene nokunyakaza okuhlobene phakathi kwezindawo ezimbili ezithintanayo. Kunezinhlobo ezimbili eziyinhloko zokungqubuzana: ukungqubuzana okungaguquki kanye nokungqubuzana kwe-kinetic. Zombili zidlala indima ebalulekile ezimweni ezahlukahlukene zomzimba kanye nezicelo ezisebenzayo. Lesi sihloko sizoxoxa ngezincazelo, amafomula, kanye nokusetshenziswa kokungqubuzana okungaguquki kanye nokungqubuzana kwe-kinetic, kanye nokunikeza izibonelo zokubala ukuze kucaciswe le mibono.
Ukuqonda Ukungqubuzana
Ukungqubuzana kungamandla aphikisana nokunyakaza okuhlobene phakathi kwezindawo ezimbili ezithintanayo. La mandla avela ekusebenzisaneni kwama-microscopic phakathi kwezindawo ezimahhadlahhadla ezingeni lama-microscopic. Kunezinhlobo ezimbili eziyinhloko zokungqubuzana:
1. Ukungqubuzana Okungaguquki: Amandla asebenza ukuvimbela ukuqala kokunyakaza phakathi kwezindawo ezimbili ezithintanayo. La mandla okungqubuzana asebenza aze afinyelele umkhawulo omkhulu, obizwa ngokuthi amandla amakhulu okungqubuzana okungaguquki.
2. Ukungqubuzana Kwe-Kinetic: Amandla asebenza ngokumelene nokunyakaza okuhlobene phakathi kwezindawo ezimbili esezivele zihamba maqondana. Amandla okungqubuzana kwe-kinetic ngokuvamile mancane kune-maximum static friction force.
Ifomula Yamandla Okungqubuzana Okungaguquki
Amandla okungqubuzana angaguquki (\(f_s\)) amandla okumele anqotshwe ukuze kuqalwe ukunyakaza okuhlobene phakathi kwezindawo ezimbili. La mandla alingana namandla ajwayelekile (\(N\)) asebenza entweni kanye ne-coefficient yokungqubuzana okungaguquki (\(\mu_s\)). Ifomula ithi:
\[ f_s \leq \mu_s N \]
Di mana:
– \(f_s\) amandla okungqubuzana okungaguquki (Newton, N),
– \(\mu_s\) yi-coefficient yokungqubuzana okungaguquki (ayinawo amayunithi),
– \(N\) amandla avamile asebenza entweni (Newton, N).
Amandla okungqubuzana amile afinyelela inani lawo eliphezulu lapho into isendaweni ngaphambi nje kokuba iqale ukuhamba:
\[ f_s^{\text{max}} = \mu_s N \]
Ifomula Yamandla Okungqubuzana Kwe-Kinetic
Amandla okungqubuzana kwe-kinetic (\(f_k\)) amandla asebenza ngokumelene nokunyakaza okuhlobene phakathi kwezindawo ezimbili esezivele zihamba maqondana. La mandla aphinde alingane namandla ajwayelekile (\(N\)) asebenza entweni kanye ne-coefficient yokungqubuzana kwe-kinetic (\(\mu_k\)). Ifomula ithi:
\[ f_k = \mu_k N \]
Di mana:
– \(f_k\) amandla okungqubuzana kwe-kinetic (Newton, N),
– \(\mu_k\) yi-coefficient ye-kinetic friction (ayinawo amayunithi),
– \(N\) amandla avamile asebenza entweni (Newton, N).
Umehluko phakathi kwe-Static ne-Kinetic Friction
1. Ubukhulu Bamandla: Amandla aphezulu okungqubuzana aqinile ahlala makhulu noma alingana namandla okungqubuzana ahambayo. Lokhu kusho ukuthi kudingeka amandla amakhulu ukuqala ukunyakaza kwento kunokuba agcine into ihamba.
2. I-Coefficient of Friction: I-coefficient of static friction (\(\mu_s\)) ivame ukuba nkulu kune-coefficient of kinetic friction (\(\mu_k\)). Lokhu kubonisa ukuthi kunzima kakhulu ukuqala into inyakaza kunokugcina ukunyakaza kwayo.
Ukusetshenziswa Kokungqubuzana Empilweni Yansuku Zonke
Ukungqubuzana, kokubili okungaguquki kanye nokujiya, kunezinhlelo eziningi ezibalulekile empilweni yansuku zonke kanye nobuchwepheshe. Nazi ezinye izibonelo:
IsiKendaraan
Ezimotweni, ukungqubuzana phakathi kwamathayi nomgwaqo kubalulekile ekubambeni nasekulawuleni. Ukungqubuzana okungaguquki kuvumela imoto ukuthi iqale futhi isheshise, kuyilapho ukungqubuzana kwe-kinetic kudlala indima ekunciphiseni nasekumiseni imoto. Izinhlelo zamabhuleki zenzelwe ukusebenzisa ukungqubuzana kwe-kinetic ukuze kumiswe imoto ngokuphephile.
I-Peralatan Rumah Tangga
Ukungqubuzana kubalulekile nasezintweni eziningi zasendlini. Isibonelo, uma usebenzisa i-coffee grinder, ukungqubuzana phakathi kwama-coffee beans nama-blades e-grinder kuvumela ukuthi ama-beans aqhekezwe abe yizicucu ezincane. Emshinini wokuwasha, ukungqubuzana phakathi kwezingubo ne-drum kusiza ukususa ukungcola emicu yendwangu.
Ezemidlalo
Kwezemidlalo, ukungqubuzana kudlala indima ebalulekile ekusebenzeni komdlali. Kwezemidlalo ezifana nebhola noma i-basketball, izicathulo ezinezithende zerabha zinikeza ukungqubuzana okwanele ukuvimbela ukushelela. Emijahweni yezimoto, amathayi aklanywe ngokukhethekile asetshenziselwa ukwandisa ukungqubuzana endaweni yokugijima, okuvumela izimoto ukuba zijike ngesivinini esikhulu ngaphandle kokushelela.
Ukwakha kanye Nezimboni
Ekwakhiweni, ukungqubuzana kusetshenziswa ukuqinisa izakhiwo. Isibonelo, isikhonkwane noma isipikili esishayelwa emhlabathini sikhiqiza ukungqubuzana okwanele ukumelana nemithwalo eqondile. Embonini yokukhiqiza, ukungqubuzana kusetshenziswa ezinqubweni ezifana nokugaya nokusika insimbi.
Isibonelo Sokubalwa Kwamandla Okungqubuzana
Ake sibheke ezinye izibonelo zokubala amandla okungqubuzana ezimweni ezahlukene ukuze sicacise ukuqonda kwethu.
Isibonelo 1: Ukubala Amandla Okungqubuzana Okungaguquki
Ibhokisi elinesisindo esingamakhilogremu ayi-10 libekwa endaweni eyisicaba. I-coefficient yokungqubuzana okungaguquki phakathi kwebhokisi kanye nobuso ingu-0.5. Bala amandla aphezulu okungqubuzana okungaguquki angasebenza ebhokisini.
Kuyaziwa:
– Isisindo (\(m\)) = 10 kg,
– I-coefficient yokungqubuzana okuqinile (\(\mu_s\)) = 0.5,
– Ukusheshisa ngenxa yamandla adonsela phansi (\(g\)) = 9.8 \(m/s^2\).
Ukubala amandla avamile (\(N\)):
\[ N = mg \]
\[ N = 10 \, \umbhalo{kg} \izikhathi 9.8 \, \umbhalo{m/s}^2 \]
\[ N = 98 \, \umbhalo{N} \]
Ukubala amandla aphezulu okungqubuzana okungaguquki (\(f_s^{\text{max}}\)):
\[ f_s^{\text{max}} = \mu_s N \]
\[ f_s^{\text{max}} = 0.5 \times 98 \, \text{N} \]
\[ f_s^{\text{max}} = 49 \, \text{N} \]
Ngakho-ke, amandla aphezulu okungqubuzana okungaguquki angasebenza ebhokisini angama-49 N.
Isibonelo 2: Ukubala Amandla Okushayisana Kwe-Kinetic
Ibhloko elinesisindo esingu-15 kg lidonswa phezu kwendawo eyisicaba ngesivinini esingaguquki. I-coefficient ye-kinetic friction phakathi kwebhloko kanye nobuso ingu-0.3. Bala amandla e-kinetic friction asebenza kubhloko.
Kuyaziwa:
– Isisindo (\(m\)) = 15 kg,
– I-coefficient yokungqubuzana kwe-kinetic (\(\mu_k\)) = 0.3,
– Ukusheshisa ngenxa yamandla adonsela phansi (\(g\)) = 9.8 \(m/s^2\).
Ukubala amandla avamile (\(N\)):
\[ N = mg \]
\[ N = 15 \, \umbhalo{kg} \izikhathi 9.8 \, \umbhalo{m/s}^2 \]
\[ N = 147 \, \umbhalo{N} \]
Ukubala amandla okungqubuzana kwe-kinetic (\(f_k\)):
\[ f_k = \mu_k N \]
\[ f_k = 0.3 \izikhathi ezingu-147 \, \umbhalo{N} \]
\[ f_k = 44.1 \, \umbhalo{N} \]
Ngakho-ke, amandla okungqubuzana kwe-kinetic asebenza kubhlokhi angama-44.1 N.
Isiphetho
Ukungqubuzana, kokubili okungaguquki kanye nokujiya, kuwumqondo oyisisekelo ku-physics onezinhlelo eziningi ezisebenzayo. Ukungqubuzana okungaguquki kungamandla avimbela ukuqala kokunyakaza okuhlobene phakathi kwezindawo ezimbili, kuyilapho ukungqubuzana okungaguquki kungamandla aphikisana nokunyakaza okuhlobene phakathi kwezindawo esezivele zihamba. I-coefficient yokungqubuzana, kokubili okungaguquki kanye nokujiya, iyisici esibalulekile esithonya ubukhulu bokungqubuzana. Ukuqonda amafomula ayisisekelo kanye nemibono yokungqubuzana kusenza sikwazi ukuhlaziya izimo ezahlukahlukene zomzimba futhi sakhe izinhlelo ezisebenza kahle neziphephile ezimweni ezahlukahlukene zansuku zonke kanye nezobuchwepheshe.
