Amanethiwekhi eGurumuda
Ama-vector eyunithi - izinkinga nezixazululo
1. Into ihamba ngesivinini esingu -v = (2i − 1.5j) m/s. Iyini i- displacement yento ngemva kwemizuzwana emi-4?
Kwaziwa:
Ingxenye evundlile yejubane (v x ) = 2 m/s
Ingxenye eqondile yejubane (v y ) = 1.5 m/s
Isikhawu sesikhathi (t) = imizuzwana eyi-4
Okufunwayo: Ukufuduka
Ukufuduka kwe-Vector - izinkinga nezixazululo
1. Umuntu uhamba ukusuka endaweni A ukuya endaweni B, amamitha angu-600 enyakatho; bese efika endaweni C, amamitha angu-400 entshonalanga; bese efika endaweni D, amamitha angu-200 eningizimu; bese eqeda endaweni E, amamitha angu-700 empumalanga. Ungakanani ubukhulu bokufuduka?
Isixazululo:
Kwaziwa:
AF = AB – BF = AB – CD = 600 – 200 = 400 m
EF = DE – DF = DE – BC = 700 – 400 = 300 m
Ukwengeza ama-vector usebenzisa izingxenye - izinkinga nezixazululo
1. Amavektha amathathu njengoba kuboniswe esithombeni esingezansi.
V1 = 30
V 2 = 30
V 3 = 40
Iyini imiphumela ye- vectors.
Kwaziwa:
V 1 = 30, i-engeli ephakathi kwe-V 1 kanye ne-x axis = 30 o
Imidwebo yokunyakaza okuqondile - izinkinga nezixazululo
1. Ibanga legrafu (eliqondile) uma liqhathaniswa nesikhathi (eliqondile) njengoba kuboniswe esithombeni esingezansi. Into ephumulile eboniswe ngenombolo…
Isixazululo:
Inombolo 3, ekhonjiswa ngomugqa oqondile.
Isivinini esimaphakathi - izinkinga nezixazululo
1. Umuntu uzungeza unxande onobude obungamamitha angu-400 nobubanzi obungamamitha ayi-100, izikhathi ezingu-12 ngehora eli-1. Iyini ijubane elimaphakathi kanye nejubane elimaphakathi?
Kwaziwa:
Ubude besikwele = amamitha angu-400
Ububanzi besikwele = amamitha ayi-100
Ukujikeleza kwesikwele = (2 x 400 amamitha) + (2 x 100 amamitha) = amamitha angu-800 + amamitha angu-200 = amamitha ayi-1000
Ibanga = 12 x 1000 amamitha = 12,000 amamitha = 12 amakhilomitha
27 Ukunyakaza kwe-projectile – izinkinga nezixazululo 1. Inhlamvu idutshulwa nge-engeli θ = 60o ngesivinini esingu-20 m/s. Ukusheshisa ngenxa yamandla adonsela phansi kungu-10 m/s2. Yisiphi isikhathi sokufinyelela ukuphakama okuphezulu? Okuyaziwayo: Ijubane lokuqala lenhlamvu (vo) = 20 m/s I-engeli (θ) = 60oC … Funda kabanzi
Umgomo omnyama - izinkinga nezixazululo
1. Amanzi angamagremu angu-200 ku-30°C axutshwe namanzi angamagremu angu-100 ku-90°C. Ukushisa okuqondile kwamanzi = 1 cal.gram −1 °C −1 . Thola izinga lokushisa lokugcina lengxube!
Kwaziwa:
Isisindo samanzi 2 (m 1 ) = 200 amagremu
Izinga lokushisa lamanzi 1 (T 1 ) = 30 o C
Isisindo samanzi 2 (m2 ) = 100 amagremu
Izinto eziyi-10 ezixhunywe ngentambo phezu kwe-pulley Umshini we-Atwood – Izinkinga Nezixazululo
1. Ibhulokhi A enesisindo esingu -5 kg, ibekwe endaweni ebushelelezi evundlile. Ibhulokhi B enesisindo esingu-3 kg ilenga kolunye uhlangothi lwentambo exhunywe nebhulokhi A phezu kwe-pulley. Ukusheshisa ngenxa yamandla adonsela phansi kungu-10 m/s 2. Kuyini ukusheshisa kwamabhulokhi womabili?
Kwaziwa:
Isisindo sebhulokhi A (mA) = 5 kg
Isisindo sebhulokhi B (m B ) = 3 kg
Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s 2
Ukunyakaza okujikelezayo - izinkinga nezixazululo
1. Into enesisindo esingamakhilogremu ayi-10 ihamba ngendilinga ngesivinini esingaguquki esingu-4 m/s. Uma irediyasi yendilinga ingamamitha angu-0.5, khona-ke:
1) Imvamisa yezindilinga ingu-4/π Hz
2) Ukusheshisa kwe-centripetal kungu-32 ms -2
3) Amandla aphakathi nendawo angama-320 N
4) Isikhathi singu-4π s.
Yiziphi izitatimende eziyiqiniso?
Ukunyakaza kokuwa okukhululekile - izinkinga nezixazululo
1. Itshe liwa ngokukhululeka lisuka ekuphakameni kwamamitha angu-45. Uma ukusheshisa ngenxa yamandla adonsela phansi kungu-10 ms -2 , lingakanani ijubane letshe uma lishaya phansi?
Kwaziwa:
Ukuphakama (h) = amamitha angu-45
Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s 2
Okufunwayo: Ijubane lokugcina letshe lapho lishaya phansi (v t )