Izihloko zefiziksi mayelana nezenzakalo zemvelo njll. ezihlobene nefiziksi.
Izibonelo eziyi-16 zemibuzo yokunyakaza kwamahhala ekwindla.
1. Isithelo sikakhukhunathi siyasuka esiqwini bese sifika phansi ngemva kwemizuzwana emithathu. Lingakanani ijubane likakhukhunathi uma lifika phansi? g = 10 m/s2
Ingxoxo
I-Diketahui :
t = imizuzwana emi-3
g = 10 m/s2
Kubuziwe :
4 Izibonelo zobuningi obutholakalayo, ubukhulu bamazwe ngamazwe kanye namafomula eyunithi
| Ubuningi obutholiwe | Ifomula | Iyini inani eliyinhloko elihlanganisiwe? | Ubukhulu benani elitholiwe | Uhlelo Lwamazwe Ngamazwe Lwamayunithi Inani elitholiwe |
| Kukhulu | Ubude x ububanzi | Ubude (2) | [L2] | m2 |
| Umthamo we-cuboid | Ubude x ububanzi x ukuphakama | Ubude (3) | [L3] | m3 |
| Ubuningi | Isisindo / Umthamo | Isisindo (1), ubude (3) | [M] / [L]3] = [M][L-3] | Kg / m3 |
| I-Kecepatan | Ibanga / isikhathi | Ubude (1), isikhathi (1) | [L] / [T] = [L] [T]-1] | m / s |
| Ukusheshisa | Isivinini / isikhathi | Ubude (1), isikhathi (2) | [L] [T]-1] / [T] = [L] [T]-2] | m / s2 |
| I-Gaya | Isisindo x ukusheshisa | Isisindo (1), ubude (1), isikhathi (2) | [M][L][T-2] | Amakhilogremu m/s2 |
| Ibhizinisi | Amandla x ukufuduka | Isisindo (1), ubude (2), isikhathi (2) | [M][L][T-2][L] = [M][L2][T-2] | kg m2/s2 |
Ukuze uthole inani lamanani ayisisekelo, qala uthole ifomula yenani elithathwe.
Imiyalelo yokuhlolwa komthetho ka-Archimedes
Inhloso yokuhlolwa komthetho ka-Archimedes:
– Abafundi bangalinganisa umthamo kanye nesisindo samanzi asuswe yinto ecwiliswe emanzini.
– Abafundi bangazi futhi baqonde umthetho ka-Archimedes
Amathuluzi nezinto zokwakha:
– Isitsha esiphakathi nendawo (1)
– Isitsha esincane (1)
– I-Dynamometer (1)
– Layisha (1)
Izibonelo Ezi-6 Zemibuzo Yomthetho Ka-Archimedes
1. Yiliphi ivolumu yetshe elifakwa emanzini olwandle uma isisindo samanzi olwandle esisuswe yitshe singama-Newton amabili? Ubuningi bamanzi olwandle = 1025 kg/m3.
Ingxoxo
Izibonelo ezi-5 zemibuzo yokuphaphazela
1. Isisindo somthwalo osemoyeni singama-N angu-3, isisindo somthwalo osemanzini singama-N angu-2,8. Angakanani amandla amanzi asebenzisa umthwalo?
Ingxoxo:
Ukuqonda Umthetho KaPascal
Isebenza kanjani i-hydraulic jack/lift uma isetshenziswa ukuphakamisa imoto? Amabhuleki e-hydraulic asebenza kanjani uma isetshenziswa ukwehlisa ijubane lemoto?
Njengoba sifundile esihlokweni se- Fluid Pressure , lonke uketshezi lucindezela zonke izinto oluhlangana nazo. Amanzi esiwafaka engilazini acindezela izindonga zengilazi. Ngokufanayo, uma sigeza echibini lokubhukuda noma emanzini olwandle, amanzi acindezela umzimba wethu wonke.
Izibonelo Eziyi-9 Zomthetho KaPascal
1. Indawo enqamula ingxenye ye-hydraulic jack ngayinye ingu-0,04 m2 kanye no-0,10 m2Uma amandla okufaka angama-Newton angu-5, yiliphi amandla okukhipha aphezulu?
Ingxoxo:
Kuyaziwa ukuthi:
A1 = 0,04m2
A2 = 0,10m2
F1 = 5 uN
Kubuziwe: F2 ?
Impendulo:
Esifundweni sangaphambilini sefiziksi, sifunde izihloko ze- particle dynamics kanye ne -rotational dynamics . Ku-particle dynamics, sifunde izinhlayiya ekuhambeni kokuhumusha ( ukunyakaza okuqondile , ukunyakaza okujikelezayo , ukunyakaza kwe-parabolic ). Ku-rotational dynamics, sifunde imizimba eqinile ejikelezayo. Kulesi sihloko, sifunde izinto ezilinganayo. Kunezinhlobo ezimbili ze-equilibrium, okungukuthi i-static equilibrium kanye ne-dynamic equilibrium. Ngokomthetho wokuqala kaNewton, into isesimweni se-static equilibrium uma into iphumule kanti into isesimweni se-dynamic equilibrium uma into ihamba ngesivinini esingaguquki. Leli phepha ligxile kakhulu engxoxweni ye-static equilibrium (izinto ezimile).
I-Rotational dynamics iyigatsha le-mechanics elifunda ukunyakaza kokujikeleza okubandakanya amandla, ubuningi, nezinye izinto ezithonya ukunyakaza kokujikeleza. Into iyajikeleza uma zonke izingxenye zento zihamba zizungeze i-axis noma i-pivot etholakala kwenye yezingxenye zento. Ukunyakaza kokujikeleza okufundwe kulesi sihloko kugxile ekunyakazeni kokujikeleza mayelana ne-axis ehleliwe. Ukunyakaza kwe-pulley, ifeni, ukunyakaza kwe-CD/DVD ekamelweni le-CD/DVD , ukunyakaza komnyango noma ifasitela, ukunyakaza kwesilinda senjini, i-helicopter noma i-propeller yendiza, noma i-propeller yomkhumbi ezinye zezibonelo zokunyakaza kokujikeleza mayelana ne-axis ehleliwe. Wake wayibona i-top ejikelezayo? Indawo ye-axis ye-rounding top ihlala ishintsha (ukuthambekela kwe-top kuvame ukushintsha), ngakho-ke ukunyakaza kokujikeleza okufana nalokho okubonwa yi-top ejikelezayo akufundiwe kulesi sihloko.
Ukuqonda Izimiso Zabamnyama
Uma sixuba amanzi ashisayo nabandayo esitsheni esivulekile (isibonelo, ibhakede), ukushisa kuyadlula kusuka emanzini ashisayo kuya emanzini abandayo. Ngenxa yokuthi isitsha sivuliwe, okunye ukushisa kuyadlula emoyeni. Isitsha siyafudumala futhi. Ukushisa okukhishwa ngamanzi ashisayo akugcini nje ngokumuncwa ngamanzi abandayo kodwa futhi nomoya kanye nesitsha. Kulokhu, ibhakede liyisistimu engahlukanisiwe.
Uma sixuba amanzi ashisayo nabandayo ku-thermos evaliwe, ukushisa kuyadlula kusuka emanzini ashisayo kuya emanzini abandayo. I-thermos iyisistimu ehlukanisiwe , ngakho akukho ukushisa okudluliselwa emoyeni noma ku-thermos. Ukushisa okukhishwa ngamanzi ashisayo kumane kumuncwa ngamanzi abandayo kuze kube yilapho ingxube ifinyelela ukulingana kokushisa.