1. Ibanga eliphakathi kwemisele emibili yamagagasi ongaphezulu kwamanzi lingama-20 m. Into intanta phezu kwamanzi ukuze ibone ukunyakaza kokudlidliza. Uma isikhathi sokuhamba kokudlidliza okukodwa kuyimizuzwana emi-4, khona-ke ijubane legagasi lingu …. m/s
A. 20
B. 15
C. 10
D. 5
Kwaziwa:
Ubude begagasi (λ) = amamitha angu-20
Inkathi (T) = imizuzwana emi-4
Okufunwayo: Isivinini segagasi (v)
Isixazululo:
Isibalo sejubane lamagagasi:
v = λ / T = amamitha angu-20 / imizuzwana engu-4 = amamitha angu-5 / isekhondi
Impendulo efanele ngu-D.
2. Amaphuzu amabili u-A no-B asentanjeni futhi aqhelelene ngamasentimitha angama-90. Entanjeni kusakazwa amagagasi adlulayo , ukuze iphuzu u-A libe phezulu kwegagasi, iphuzu u-B libe phansi kwegagasi, futhi phakathi kwawo, kukhona ama-crests amabili kanye nemifudlana emibili. Uma isikhathi samagagasi singamasekhondi angu-0.3, khona-ke ukusakazwa kwamagagasi…
A. 10.8 cm/s
B. 18.0 cm/s
C. 120.0 cm/s
D. 200.0 cm/s
Kwaziwa:
Ibanga AB (l) = 90 cm
Isikhathi segagasi (T) = imizuzwana engu-0.3
Imvamisa yamagagasi (f) = 1/0.3 imizuzwana
Iphuzu A lisesiqongweni segagasi kanti iphuzu B lisemgodini wegagasi.
Phakathi kwamaphuzu A no-B, kunezinsika ezimbili kanye nezinsika ezimbili.
Okufunwayo: Isivinini segagasi (v = f λ)
Isixazululo:
Ngokusekelwe esithombeni, singaphetha ngokuthi kunezingqimba zamaza angu-2.5. Ibanga lobude be-wavelength (λ) = 90 cm / 2.5 = 36 cm
Isivinini segagasi:
v = f λ = (1 / 0.3) (36) = 36 / 0.3 = 120 cm/s.
Impendulo efanele ithi C.
3. Igrafu elandelayo ibonisa ukufuduka kwephuzu endaweni eyodwa njengomsebenzi wesikhathi lapho igagasi lidlula endaweni.
Uma ubude be-wavelength bungamamitha ayi-6, khona-ke ijubane lokusabalala kwamagagasi…
A. 3 m/s
B. 6 m/s
C. 8 m/s
D. 12 m/s
Kwaziwa:
Kunezingqimba ezimbili zamaza ngokusekelwe kugrafu engenhla.
Ibanga lobude be-wavelength obungu-1 (λ) = amamitha angu-6 / 2 = amamitha angu-3
Inkathi (T) = imizuzwana emi-0.5
Okufunwayo: Isivinini samagagasi (v)
Isixazululo:
v = f λ = λ / T = amamitha angu-3 / imizuzwana engu-0.5 = amamitha angu-6 / isekhondi
Impendulo efanele ngu-B.
4. Ngokusekelwe esithombeni esingezansi, iphuzu elinomehluko wesigaba ¾ nephuzu A lingu ....
A. Iphuzu B
B. Iphuzu C
C. Iphuzu D
D. Iphuzu E
Isixazululo
Iphuzu B linomehluko wesigaba esingu-¼ λ nephuzu A
Iphuzu C linomehluko wesigaba esingu-2/4 λ noma u-1/2 λ nephuzu A
Iphuzu D linomehluko wesigaba ongu-3/4 λ kanye nephuzu A
Iphuzu F linomehluko wesigaba ongu-5/4 λ kanye nephuzu A.
Impendulo efanele ithi C.
5. Ebusweni bechibi, kunamaqabunga amabili omile aqhele ngamasentimitha angu-60 ukusuka komunye nomunye. Womabili ahamba phezulu naphansi njengobuso bamanzi ngemvamisa engu-2 Hz. Uma iqabunga elilodwa lisebusweni, amanye amaqabunga asemathunjini, futhi phakathi kwawo, kukhona ibusweni elilodwa kanye nebusweni elilodwa. Thola isivinini sokusabalala kwamagagasi.
A. 20 cm/s
B. 30 cm/s
C. 80 cm/s
D. 120 cm/s
Kwaziwa:
Ibanga phakathi kwamaqabunga womabili = 60 cm
Imvamisa (f) = 2 Hz = 2
Okufunwayo: Isivinini segagasi
Isixazululo:
Phakathi kwamaqabunga womabili, kune-wavelength engu-1.5. Ibanga le-wavelength engu-1 lingu-(λ) = 60 cm / 1.5 = 40 cm
Isivinini segagasi (v):
v = f λ = (2 Hz)(40 cm) = 80 cm/isekhondi
Impendulo efanele ithi C.
6. Ngokusekelwe esithombeni esingezansi, nquma ubukhulu, isikhathi, imvamisa, kanye nesivinini segagasi.
Isixazululo:
Ukuphakama (A) = amamitha angu-4
Inkathi (T) = imizuzwana eyi-6 / 3 = imizuzwana emi-2
Imvamisa (f) = 1 / T = 1 / 2 = 0.5 hertz
Ubude bamagagasi (λ) = amamitha angu-24 / 3 = amamitha angu-8
Isivinini segagasi (v) = f λ = (0.5 hertz)(amamitha angu-8) = amamitha angu-4/umzuzwana noma
Isivinini segagasi (v) = λ / T = amamitha angu-8 / imizuzwana emi-2 = amamitha angu-4/umzuzwana
Impendulo efanele ngu-D.
7. Entanjeni enobude obuyi-1.2 m kanye nesisindo esingama-200 g kwakhiwa amagagasi e-sinusoidal ayi-1.5 anomsinga ongu-50 Hz. Ngokusekelwe kule datha, nquma isikhathi samagagasi kanye namandla okucindezela entambo.
A. Isikhathi = imizuzwana engu-0.02 kanye namandla okucindezela = 6.67 N
B. Isikhathi = imizuzwana engu-0.01 kanye namandla okucindezela = 6.67 N
C. Isikhathi = imizuzwana engu-0.02 kanye namandla okucindezela = 266.67 N
D. Isikhathi = imizuzwana engu-0.01 kanye namandla okucindezela = 266.67 N
Kwaziwa:
Ubude bentambo (l) = amamitha angu-1.2 futhi kunezinhlayiya ze-sinusoidal ezingu-1.5 ukuze ibanga lobude obungu-1 (λ) = amamitha angu-1.2 / 1.5 = amamitha angu-0.8
Isisindo sentambo (m) = 200 amagremu = 0.2 kg
Imvamisa (f) = 50 Hz
Ubuningi bentambo (µ) = m/l = 0.2 kg / 1.2 amamitha = (1/6) kg/mitha
Okufunwayo: Isikhathi segagasi (T) kanye namandla okucindezela entambo (T)
Isixazululo:
Isikhathi segagasi:
T = 1 / f = 1 / 50 Hz = 0.02 imizuzwana
Isivinini segagasi entanjeni:
v = f λ = (50 Hz)(0.8 amamitha) = 40 amamitha/umzuzwana
Amandla okucindezela (T):
Impendulo efanele ithi C.
