Izinto zokufundisa uMthetho ka-Archimedes

Izinto zokufundisa Umthetho ka-Archimedes Iqukethe Amakhono Ayisisekelo kanye Nezinkomba Zokuphumelelisa Ukufaneleka, Izinto Zokufunda, Imibuzo Eyisibonelo, Imibuzo Yokuzijwayeza kanye Nezivivinyo Zokwakha.

A. Amakhono Ayisisekelo

3. 1 Ukusebenzisa imithetho yoketshezi olungaguquki empilweni yansuku zonke

4.1 Ukuklama nokwenza izivivinyo ezisebenzisa izakhiwo zoketshezi olungashintshi, okuhlanganisa nokwethulwa kwemiphumela yokuhlolwa kanye nokusetshenziswa kwazo.

B. Izinkomba Zokufeza Ubuchule

1. Ukukhumbula (C1), ukuqonda (C2), ukusebenzisa (C3), mhlaziya (C4) bese uphetha (C5) umqondo wokuntanta, umthetho ka-Archimedes kanye nomqondo wokuntanta, ukuzulazula, ukucwila

2. Xazulula imibuzo (C4) bese ulungisa (C6) mayelana nokubhoda kanye nomthetho ka-Archimedes

3. Ukwenza (P2) ukuhlolwa hUmthetho ka-Archimedes

4. Khombisa (P3) bese unquma (P5) gkukhona okuntantayo kanye no-hUmthetho ka-Archimedes

UMTHETHO KA-ARCHIMEDES

I. ISINGENISO

Wake waba semkhunjini? Umkhumbi onobunzima obukhulu kakhulu awucwili, kanti itshe elincane, elilula lingakwazi ukucwila. Kungani kunjalo?

Uyazi ukuthi isithombe esikwesobunxele siyini? I-submarine umkhumbi ongantanta phezu kolwandle futhi ucwile ngaphansi kwamanzi. I-submarine intanta kanjani futhi icwile?

Ubonani esithombeni ngakwesokudla? Amabhaluni omoya oshisayo angandiza ezindaweni eziphakeme. Kungani amabhaluni endiza, futhi ulindiza kanjani ibhaluni lomoya oshisayo?

Imikhumbi ingantanta phezu kolwandle futhi itshuze ngaphansi kwamanzi, njengoba nje amabhaluni engantanta emoyeni, okubizwa nangokuthi umoya. Ukuze uqonde lokhu, kufanele uqale uqonde Umthetho ka-ArchimedesUkuze uqonde umthetho ka-Archimedes, kufanele uqale uqonde umqondo Ukuqina.

Umthombo wesithombe: Google.com

II. AMANDLA OKUQINISA

Yikuphi okuzwakala kulula, idwala eliphakanyisiwe emhlabeni noma idwala elifanayo eliphakanyisiwe emanzini? Uma ungakaze ubhekane nalokhu, kufanele uzame ukuphendula lo mbuzo. Kunzima ukuphakamisa idwala emhlabathini, kodwa idwala elifanayo liphakeme emanzini. Lokhu kungenxa yamandla okuntanta.

Uma into ifakwa oketshezini, kuzoba nomehluko wokucindezela phakathi koketshezi oluphezulu kwento kanye noketshezi oluphansi kwento. Uketshezi oluphansi kwento lunomfutho omkhulu kunoketshezi oluphezulu. entweni. Ukuqina kwenzeka ngenxa yokwehluka kokucindezela koketshezi ekujuleni okuhlukene.

Esithombeni, into ibonakala intanta oketshezini. Uketshezi olungaphansi koketshezi lunomfutho omkhulu kunoketshezi olungaphezu kwento, ngoba uketshezi olungaphansi kwento lunobunzulu obukhulu kunoketshezi olungaphezu kwento (h₂ > h₁).

Imininingwane: F_A = amandla okuntanta, ρ = ukuminyana koketshezi, g = ukusheshisa ngenxa yamandla adonsela phansi, V = umthamo wento ecwiliswe koketshezi

Shintsha ρV kufomula ye-Buoyancy Force ene-m kufomula yobuningi:

Imininingwane: m = isisindo, g = ukusheshisa ngenxa yamandla adonsela phansi, w = amandla adonsela phansi.

Ngokusekelwe ku-equation 2, amandla okuphapha (F)_A) ilingana nesisindo (w) soketshezi olususiwe. VUmthamo woketshezi olususiwe ufana nomthamo wento eketshezini.

III. UMTHETHO KA-ARCHIMEDES

Uma into icwiliswe ngokuphelele noma ngokwengxenye oketshezini, uketshezi lusebenzisa amandla aphezulu (ukubutha) entweni, lapho ubukhulu bamandla okubutha bulingana nesisindo soketshezi olususiwe. Umthamo woketshezi olususiwe ulingana nomthamo wento ecwiliswe oketshezini.

IV. UKUTHAMBA, UKUTHAMBA, UKUCIKA

4.1 UKUTHAMBA

Into intanta phezu koketshezi uma:

1. Isisindo sento encane kune-Buoyancy force (w < F_A), noma

2. Ubuningi bento buncane kunobuningi boketshezi ( )

Uma amandla okuphaphazela ephakeme kune-gravity, amandla aphumayo awayona i-zero, ngokwemithetho kaNewton yokunyakaza, into izoya phezulu. Kodwa empeleni into iphumule phezu koketshezi. Ngokomthetho wokuqala kaNewton, uma into iphumule khona-ke

ΣF_y = 0

F_A – w – F_a = 0

F_A = w + F_a

F_A = amandla okuphapha asetshenziswa uketshezi entweni, I-Fa = ukushukuma komoya, w = isisindo sento.

4.2 UKUTHAMBA

Into intanta phezu koketshezi uma:

1. Isisindo sento kanye Amandla okuqina (w = F)_A), noma

2. Ubuningi bento bufana nobukhulu boketshezi ( )

Ngokomthetho wokuqala kaNewton, uma into iphumule khona-ke

ΣF_y = 0

F_A – w = 0

F_A = w

4.3 UKUCIKA

1. Isisindo sento enkulu kune-Buoyancy force (w > F_A), noma

2. Ubuningi bento bukhulu kunobuningi boketshezi ( )

Ngokomthetho wokuqala kaNewton, uma into iphumule khona-ke

ΣF_y = 0

w – F_A – N = 0

w = F_A + N

F_A = amandla okuphapha asetshenziswa uketshezi entweni, N = amandla avamile asetshenziswa yisisekelo entweni, w = isisindo sento.

Kungani imikhumbi intanta?

Ngemva kokufunda incazelo engenhla, manje uzama ukuphendula umbuzo othi, kungani umkhumbi onobunzima obukhulu ungacwili kuyilapho isihlabathi esincane sicwiliza olwandle? Isihlabathi siyacwiliza ngoba ubukhulu besihlabathi bukhulu kunobuningi bamanzi olwandle. Okwamanje, imikhumbi, yize yenziwe ngensimbi, inobukhulu obukhulu kunobuningi bamanzi olwandle (ubulukhuni bensimbi bungu-7874 kg/m2³ , ukuminyana kwamanzi olwandle kungu-1025 kg/m2³), kodwa ivolumu yomkhumbi inkulu kakhulu kangangokuthi ubuningi bomkhumbi uma bubalwa kusetshenziswa ifomula yobuningi ρ = m / V incane kunobuningi bamanzi olwandle.

Uma sisebenzisa umqondo wokubutha kanye nokudonsa phansi, imikhumbi iyantanta ngoba ukubutha kukhulu kunokudonsa phansi komkhumbi.

Indlela imikhumbi-ngwenya ecwila ngayo

Ukuze intante, ubukhulu bomkhumbi-ngwenya kumele bube buncane kunobuningi bamanzi olwandle, ngokufanayo nomkhumbi-ngwenya ungantanta uma ubukhulu bawo bukhulu kunobuningi bamanzi olwandle noma bulingana nobukhulu bamanzi olwandle. Umthamo womkhumbi-ngwenya uyafana, ngakho-ke ukuze intante futhi intante, ubukhulu bomkhumbi-ngwenya bungashintshwa ngokufaka amanzi nomoya emathangini e-ballast. Uma ufuna ukuntanta, faka amanzi ethangini le-ballast futhi uma ufuna ukuntanta phezu kwamanzi, amanzi ayasuswa ethangini bese umoya ufakwa ethangini.

Kusetshenziswa umqondo wokuntanta kanye nokudonsa phansi, umkhumbi-ngwenya ungantanta uma amandla okuntanta makhulu kunokudonsa phansi komkhumbi-ngwenya. Umkhumbi-ngwenya ungantanta uma amandla okuntanta omkhumbi makhulu kunokudonsa phansi okusetshenziswa amanzi olwandle kumkhumbi-ngwenya.

Kungani futhi kanjani amabhaluni omoya oshisayo angandiza

Amabhaluni andizela emoyeni ngoba ngaphakathi ebhaluni kukhona igesi enobukhulu obuncane kunobukhulu bomoya ozungezile. Ngakolunye uhlangothi, uma ubukhulu begesi ngaphakathi ebhaluni bufana nobukhulu bomoya obuzungezile, ibhaluni liwela phansi futhi alindizi liye endaweni ephakeme.

Kusetshenziswa umqondo wokubutha, ibhaluni lomoya oshisayo liyaphakama ngoba amandla okubutha makhulu kunomdonsi webhaluni. Ibhaluni liwela phansi lapho amandla adonsela phansi ebhaluni makhulu kunomdonsi webhaluni okhishwa umoya osebhaluni.

V. IMIBUZO YESIBONELO

5.1. Isisindo somthwalo emoyeni singama-N angu-5, isisindo somthwalo uma silinganiswa ngoketshezi singama-N angu-4. Amandla okuphaphazela angakanani?

Ingxoxo

Kuyaziwa:

Isisindo somthwalo emoyeni (w) = 5 N

Isisindo somthwalo emanzini (w)_F) = 4 N

Kubuziwe: Amandla okuqina (F)_A)

Impendulo:

Uma kulinganiswa ngoketshezi, isisindo esithile somthwalo siyalahleka ngenxa yamandla okubutha. Ubukhulu bamandla okubutha = umehluko phakathi kwesisindo somthwalo emoyeni kanye nesisindo somthwalo oketshezini.

F_A = 5 – 4 = 1 Newton

5.2. Isitsha esigcwele amanzi sigcwaliswa ngetshe, okubangela ukuthi amanye amanzi achitheke. Umthamo wamanzi achithekile ungama-0,1 m^3.. Ubuningi bamanzi = 1000 kg/m³, Ukusheshisa ngenxa yamandla adonsela phansi angu-10 m/s². Angakanani amandla amanzi asebenza edwaleni?

Ingxoxo

Kuyaziwa:

Umthamo wamanzi achithekile (V) = 0,1 m³

Ubuningi bamanzi (ρ) = 1000 kg/m³

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s²

Kubuziwe: Amandla okuqina (F)_A)

Impendulo:

F_A = ρ g V = (1000)(10)(0,1) = 1000 N

5.3. Uma into ifakwa esitsheni esigcwele amanzi olwandle, amanye amanzi olwandle achitheka ngo-0,2 m³Ubuningi bamanzi olwandle = 1025 kg/m2³Ukusheshisa ngenxa yamandla adonsela phansi kungu-10 m/s²Bala isisindo samanzi olwandle asusiwe/achithekile.

Ingxoxo

Kuyaziwa:

Umthamo (V) = 0,2 m³

Ubuningi bamanzi olwandle (ρ) = 1025 kg/m2³.

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s²

Kubuziwe: Isisindo samanzi olwandle asisekho/achithekile

Impendulo:

Umthetho ka-Archimedes uthi ubukhulu bamandla agelezayo = isisindo samanzi olwandle asusiwe/achithekile

F_A = ρ g V = (1025)(10)(0,2) = 2050 N

5.4. Insimbi inesisindo esingu-100 N uma ilinganiswa emoyeni kanye no-80 N uma ilinganiswa emanzini. Iyini ivolumu yensimbi? Ubuningi bamanzi = 1000 kg/m³, ukusheshisa ngenxa yamandla adonsela phansi = 10 m/s².

Ingxoxo

Kuyaziwa:

Isisindo emoyeni (w) = 100 N

Isisindo emanzini (w)_f) = 80 N

Ubuningi bamanzi (ρ) = 1000 kg/m³

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s²

Kubuziwe: Ivolumu yensimbi

Impendulo:

F_A = 100 – 80 = 20 N

F_A = ρ g V

20 = (1000)(10) V

20 = 10.000 V

5.5. Into enesisindo esingu-20 N ifakwa oketshezini. Uma amandla okuphapha engu-30 N, ingabe into iyacwila, iyantanta noma iyantanta?

Ingxoxo

Amandla okuphapha makhulu kunesisindo sento, F_A > w, ukuze into intante.

Into iyacwila uma amandla okuphapha engaphansi kwesisindo sento (F)_A < w)

VI. ZIREKISE IMIBUZO NEZINHLOBO ZEZIMPENDULO

https://gurumuda.net/soal-ujian/soal-latihan-hukum-archimedes

VII. IMIBUZO YOKUHLOLA OKUQALAYO

https://gurumuda.net/soal-ujian/tes-formatif-hukum-archimedes

🙂

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