Mienzaniso 20 yeMitemo yaNewton
Mutemo wekutanga waNewton
1. Kana simba rinobuda richishanda pachinhu rakaenzana ne zero, saka...
(1) chinhu hachizokurumidzi
(2) zvinhu zvinogara zvakazorora
(3) kuchinja kwespeed yechinhu kuri zero
(4) hazvigoneke kuti chinhu chifambe chakatwasuka nekumhanya kwakasimba
Chokwadi ndechekuti…
A. (1), (2) uye (3)
B. (1) uye (3) chete
C. (2) uye (4) chete
D. (4) chete
E. (1), (2), (3) uye (4)
Kukurukurirana
Mhinduro chaiyo ndeiyi:
(1) Chinhu chacho hachizokurumidzi
Simba rinobuda rinoita kuti chinhu chimhanye. Kana simba rinobuda riri zero, chinhu hachimhanye.
(2) Zvinhu zvinogara zvakazorora
Mutemo wekutanga waNewton unoti kana simba rinobuda pachinhu rakaenzana ne zero, chinhu chiri pachigaro chicharamba chakazorora uye chinhu chiri kufamba nekumhanya kwakasimba (kufamba kwakafanana kwemutsara) chicharamba chichifamba nekumhanya kwakasimba.
(3) Kuchinja kwespeed yechinhu izero
Kuchinja kwekukurumidza = kukurumidza. Kuchinja kwekukurumidza kwechinhu izero, zvichireva kuti kukurumidza kwechinhu izero. Kana kukurumidza kuri zero, simba rinobuda pachinhu izero.
Mhinduro chaiyo ndiA.
Zvinhu Zviri MuElevator
2. Kana Sandi ari muelevator isingamire, huremu hwake hunosvika 500 N. Kumhanya kunokonzerwa negiravhiti = 10 ms –2 . Kana elevator ikawedzera, kumanikidzwa kwetambo kunosvika 750 N. Saka, kumhanya kweelevator kunosvika…
A. 5,0 ms –2
B. 7,5 ms –2
C. 10,0 ms –2
D. 12,5 ms –2
E. 15,0 ms –2
Kukurukurirana
Zvinozivikanwa kuti:
Kurema kwekodhi (w) = 500 Newton = 500 kg ms –2 (elevator iri pakuzorora)
Kukurumidza kunokonzerwa negiravhiti (g) = 10 ms –2
Huremu hwepachivande (m) = 500 / 10 = 50 kg
Kubata kwetambo (T) = 750 N (elevator inokurumidza)
Huremu hwechikwidzo hahuna kutariswa.
Akabvunzwa: Kukurumidza kwerifiti
Mhinduro:
Chikwidziridzo chiri panze, hapana kumhanyisa (a = 0). Simba rekumusoro rakanaka, simba rekudzikira harina kunaka.
ΣF = ma
T – w = 0
T = w
T = 500 Newton
Kana chikwidzo chikamhanya chichidzika pasi, simba rekumanikidza riri mutambo rinova pasi pemaNewton 500. Kune rumwe rutivi, kana chikwidzo chikamhanya chichikwira kumusoro, simba rekumanikidza riri mutambo rinova guru kupfuura maNewton 500.
Kumanikidzwa kwetambo kunosvika 750 N, zvichiita kuti elevator ikwire kumusoro. Masimba ari munzira imwecheteyo nekufamba kweelevator akanaka, uye masimba ari munzira yakasiyana haana kunaka.
T – w = ma
750 – 500 = 50 a
250 = 50 a
a = 250 / 50
a = 5,0 ms –2
Mhinduro chaiyo ndiA.
3. Munhu ane huremu hwe60 kg ari muelevator iri kufamba ichidzika pasi nekumhanya kwe3 ms -2 . Kana kumhanya nekuda kwesimba rinokwevera pasi kuri 10 ms -2 , saka simba rakajairika rinoitwa neelevator pasi pamunhu...
A. 180 N
B. 200 N
C. 340 N
D. 420 N
E. 600 N
Kukurukurirana
Zvinozivikanwa kuti:
Huremu (m) = 60 kg
Kukurumidza kwemunhu neelevator (a) = 3 m/s 2
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s 2
Simba regiravhiti (w) = mg = (60)(10) = 600 Newtons
Akabvunzwa: simba rakajairika (N)
Mhinduro:
Kune masimba maviri anoshanda pamunhu ari muelevator, anoti simba rinokwevera pasi (w) uye simba rakajairika rinoitwa nepasi reelevator pamunhu (N). Kune mavector quantities matatu, anoti simba rinokwevera pasi, simba rakajairika, uye kuwedzera simba reelevator, uko simba rinokwevera pasi rinonangidzirwa pasi, simba rakajairika rinonangidzirwa kumusoro, uye kuwedzera simba reelevator kunonangidzirwa pasi. Vector quantity inosarudzwa kuti ive nechiratidzo chakanaka uye vector quantity inosarudzwa kuti ive nechiratidzo chisina kunaka.
∑ F = ma
w – N = (60)(3)
600 – N = 180
N = 600 – 180
N = 420 Newton
Mhinduro chaiyo ndiD.
4. Reza, ane huremu hwe40 kg, ari muelevator iri kufamba ichikwira mudenga. Kana simba repasi reelevator patsoka dzaReza riri 520 N uye kumhanya kunokonzerwa negravity kuri 10 ms -2 , saka kumhanya kweelevator kuri...
A. 1,0 ms -2
B. 1,5 ms -2
C. 2,0 ms -2
D. 2,5 ms -2
E. 3,0 ms -2
Kukurukurirana
Zvinozivikanwa kuti:
Huremu (m) = 40 kg
Simba rakajairika (N) = 520 N
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s 2
Simba regiravhiti (w) = mg = (40)(10) = 400 N
Akabvunzwa: Kukurumidza kwerifiti
Mhinduro:
∑ F = ma
400 – 520 = (40)(a)
-120 = (40)(a)
a = -120/40
a = -3 m/s 2
Kumhanya kweelevator kuri 3 m/s 2. Chiratidzo chekuramba chinoreva kuti elevator iri kufamba ichikwira.
5. Munhu ane huremu hwe60 kg ari muchikwidzo chiri kufamba pasi nekumhanya kwe3 ms -2 . Tsoka dzevanhu dzinomanikidzwa zvakadii pasi pechikwidzo?
Kukurukurirana
Zvinozivikanwa kuti:
Huremu hwemunhu (m) = 60 kg
Huremu hwemunhu (w) = mg = (60 kg)(10 m/s 2 ) = 600 kg m/s 2 = 600 Newtons
Kukwidziridza elevator (a) = 3 m/s 2 , zvichidzika.
Zvabvunzwa: Tsoka dzemunhu dzinomanikidzwa zvakadii pasi perifiti?
Mhinduro:
Chikwidzi chinodzika pasi nekukurumidzisa (a) kwe3 m/s 2. Simba riri munzira imwecheteyo nekufamba kwechikwidziriso rakanaka, simba riri munzira inopesana nekufamba kwechikwidziriso harina kunaka.
w – N = ma
N = w – ma
N = 600 – (60)(3)
N = 600 – 180
N = 420 Newton
Iri ndiro simba rakajairika rinoitwa nepasi reefiti pamunhu. Munhu wacho anenge akamira panzvimbo yekukwidza kuitira kuti simba rakajairika rienzane nehuremu hwemunhu hwacho. Huremu hwacho hwakaenzana nekumanikidzwa kwetsoka dzemunhu ari pasi.
Sisitimu Yekutakura Tambo Yepulley
6. Zvinhu zviviri A naB, chimwe nechimwe chine huremu hwe6 kg uye 2 kg, zvakasungwa netambo pamusoro pepulley sezvakaratidzwa mumufananidzo. Kana kukweshana pakati petambo nepulley kukasatariswa uye g = 10 ms -2 , saka kukweshana kuri mutambo...
A. 20 N
B. 24 N
C. 27 N
D. 30 N
E. 50 N
Kukurukurirana
Zvinozivikanwa kuti:
m A = 6 kg, m B = 2 kg, g = 10 m/s 2
w A = m A g = (6 kg)(10 m/s 2 ) = 60 kg m/s 2
w B = m B g = (2 kg)(10 m/s 2 ) = 20 kg m/s 2
Mubvunzo: Chii chinonzi simba rekumanikidza retambo (T)?
Mhinduro:
w A > w B saka sisitimu inofamba ichienda kune imwe nguva (m A inofamba ichidzika, m B inofamba ichikwira).
Kukurumidzisa
ΣF = ma
w A – w B = (m A + m B ) a
60 – 20 = (6 + 2) a
40 = (8) a
a = 40 / 8 = 5 m/s 2
Kubata tambo
m A inodzika pasi
w A – T A = m A a
60 – T A = (6)(5)
60 - TA = 30
TA = 60 - 30
T 2 = 30 Newton
m B inokwira kumusoro
T B – w B = m B a
T B – 20 = (2)(5)
T B – 20 = 10
T B = 10 + 20
T 1 = 30 Newton
Kubata kwetambo (T) = 30 Newton.
Mhinduro chaiyo ndiD.
7. Tarisa mufananidzo uri padivi! Kukweshana kwetambo nepulley hakutariswe. Kana huremu A = 5 kg, g = 10 ms s —2 uye A ikadzika nekukurumidzisa kwe2,5 ms s —2 , saka huremu hweB chii?
A. 0,5 kg
B. 1 kg
C. 1,5 kg
D. 2 kg
E. 3 kg
Kukurukurirana
Zvinozivikanwa kuti:
Huremu A (m A ) = 5 kg
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s 2
Kukurumidzisa A kana kukurumidzisa sisitimu (a) = 2,5 m/s 2
Kurema A (w A ) = (m A )(g) = (5)(10) = 50 Newtons
Akabvunzwa: huremu hweB (m B ) chii?
Mhinduro:
Bhiriko A rinodzika pasi saka huremu hwaA (w A ) hwakakura kupfuura huremu hwaB (w B ).
Shandisa mutemo wechipiri waNewton:
ΣF = ma
w A – w B = (m A + m B ) a
50 – (m B )(10) = (5 + m B ) (2,5)
50 – 10 m B = 12,5 + 2,5 m B
50 – 12,5 = 2,5 m B + 10 m B
37,5 = 12,5 m B
m B = 3 kg
Mhinduro chaiyo ndiE.
8. Zvinhu zviviri zvine huremu hwe2 kg ne3 kg zvinosungwa netambo zvobva zvabatanidzwa papulley ine huremu husingatariswe sezvakaratidzwa mumufananidzo.
Kana hukuru hwekukwira kwesimba regiravhiti = 10 ms -2 , simba rekumanikidzwa kwetambo rinoonekwa nehurongwa iri...
A. 20 N
B. 24 N
C. 27 N
D. 30 N
E. 50 N
Kukurukurirana
Zvinozivikanwa kuti:
m 1 = 2 kg, m 2 = 3 kg, g = 10 m/s 2
w 1 = (m 1 )(g) = (2 kg)(10 m/s 2 ) = 20 kg m/s 2 kana 20 Newtons
w 2 = (m 2 )(g) = (3 kg)(10 m/s 2 ) = 30 kg m/s 2 kana 30 Newtons
Mubvunzo: Chii chinonzi simba rekumanikidza retambo (T)?
Mhinduro:
w 2 > w 1 saka sisitimu inofamba newachi (m 2 inofamba pasi, m 1 inofamba mudenga).
Kukurumidzisa
ΣF = ma
w 2 – w 1 = (m 1 + m 2 ) a
30 – 20 = (2 + 3) a
10 = (5) a
a = 10 / 5 = 2 m/s 2.
Kubata tambo
m2 inodzika pasi
w 2 – T 2 = m 2 a
30 – T 2 = (3)(2)
30 – T 2 = 6
T 2 = 30 – 6
T 2 = 24 Newton
m1 inokwira kumusoro
T 1 – w 1 = m 1 a
T 1 – 20 = (2)(2)
T 1 – 20 = 4
T 1 = 20 + 4
T 1 = 24 Newton
Kubata kwetambo (T) = 24 Newton.
Mhinduro chaiyo ndeiyi B.
9. Mabhuroko maviri akabatanidzwa nepulley yakatsetseka uye huremu hwepulley hunoregeredzwa sezvakaratidzwa mumufananidzo. Huremu A = m A , huremu B = m B uye bhuroko B rinodonha nekukurumidzisa a. Kana kukurumidza kunokonzerwa negiravhiti kuri g, saka hukuru hwekumanikidzwa kwetambo kunoitika mubhuroko B nde…
A. T = mB.a
B. T = m A (a – g)
C. T = m A (g – a)
D. T = m B (a – g)
E. T = m B (g – a)
Kukurukurirana
Nzvimbo yakati sandara yakatsetseka saka hapana simba rekukweshana rinodzivisa kufamba kwebhokisi A. Simba rinofambisa sisitimu yebhokisi ndiro huremu hwebhokisi B.
Verenga kukurumidza kwehurongwa:
Verenga simba rekumanikidzwa kwetambo (T):
Funga nezvekufamba kwechimwe chezvinhu, semuenzaniso A. A anofamba achienda kurudyi.
Tsiva m A mu equation 1 ne m A mu equation 2.
Mhinduro chaiyo ndiE.
10. Bhokisi rine huremu hwe10 kg rinoiswa pasi rakamanikana uye rinodhonzwa nesimba rakatambanudzwa F. Kana coefficient ye static friction iri μs = 0,5 uye chiyero chekukweshana kwekinetic μk = 0,3. Sarudza hukuru hwesimba rekukweshana kana bhokisi rava kuda kufamba. (g = 10 m/s)2)
Kukurukurirana
Chivharo chichafamba chaizvo kana hukuru hwesimba rekudhonza = hukuru hwesimba guru rekukweshana. Kukweshana kwakasimba kunoshanda pachinhu (kunodzivisa kufamba kwechinhu) kana chinhu chiri kudhonzwa asi chinhu hachisati chafamba. Kukweshana kwakasimba kune kukosha kukuru kana chinhu chave kuda kufamba (chinhu hachisati chafamba, chinhu chave kuda kufamba). Kusiyana neizvi, kukweshana kwakasimba kunoshanda pachinhu (kunodzivisa kufamba kwechinhu) kana chinhu chave kutofamba.
Zvinozivikanwa kuti:
Mubvunzo: Simba guru rekukweshana rinogara riripo (f)s)?
Mhinduro:
Kana chinhu chacho chiri padenga rakati sandara sezviri pamufananidzo, hukuru hwesimba rakajairika = huremu hwechinhu chacho.
Simba rakajairika (N) = simba rinokwevera pasi (w) = 100 Newtons
Fomura yepamusoro yekukweshana kwesimba rinomira:
Mukuverenga, coefficient ye kinetic friction haishandiswi.
11. Mabhuroko maviri anobatanidzwa netambo diki inodhonzwa nesimba rakatambanuka F = 20 N (ona mufananidzo). Kana g = 10 ms-2 uye chiyero chekukakavadzana kwekinetic pakati peblock nepamusoro i0,1, sarudza hukuru hwekumhanya kweblock...
Kukurukurirana
Zvinozivikanwa kuti:
Akabvunzwa: kukurumidza (a) kwebhuroko?
Mhinduro:
12. Bhokisi A rine huremu hwe2 kg uye B rine huremu hwe4 kg rakarongwa sezvakaratidzwa mumufananidzo. Kana coefficient yekukweshana kwepasi iri katatu coefficient yekukweshana kwebhokisi B, bhokisi A richafamba nekukurumidzisa kwe5 m/s.-2Saka chiyero chesimba rekukweshana pakati pebhuroko A nepasi kune mabhuroko A neB ndeche… g = 10 m/s2
Kukurukurirana
Zvinozivikanwa kuti:
Akabvunzwa:
Kuenzanisa kwesimba rekukweshana kwebhuroko A nepasi (f)s A) nesimba rekukweshana remabhuroko A naB (fs B)?
Mhinduro:
13. Tarisa mufananidzo uri padivi! Huremu hwebhuroko rega rega m.1 = 2 kg uye m2 = 3 kg uye huremu hwepulley hahuna kutariswa. Kana pamusoro pendege pakatsetseka uye g = 10 ms-2, ipapo kukurumidza kwehurongwa ndiko ....
A. 0,5 ms-2
B. 2,0 ms-2
C. 2,5 ms-2
D. 4,0 ms-2
E. 6,0 ms-2
Kukurukurirana
Zvinozivikanwa kuti:
m1 = 2 kg, m2 = 3 kg, g = 10 ms-2
w2 = m2 g = (3)(10) = 30 kg m/s2 kana makumi maviri eNewton
Mubvunzo: Kukurumidzisa kwesystem (a)?
Mhinduro:
14. Chinhu chine huremu chinobatanidzwa netambo inopfuura nemupuri yakatsetseka sezvakaratidzwa mumufananidzo. Kana m1 = 2 kg, m2 = 3 kg uye g = 10 ms-2, saka hukuru hwesimba rekumanikidzwa kwetambo T ndi…
A. 10,2 N
B. 13,3 N
C. 15,5 N
D. 18,3 N
E. 24,0 N
Kukurukurirana
Zvinozivikanwa kuti:
m1 = 2 kg, m2 = 3 kg, g = 10 ms-2
w1 = (2)(10) = 20 Newton
w2 = (3)(10) = 30 Newton
Mubvunzo: Simba rekumanikidzwa riri patambo (T) rakakura sei?
Mhinduro:
w2 = 30 Newtons yakakura kupfuura w1 = 20 maNewton saka m2 famba pasi, m1 fambai mudenga.
Fomura yechipiri yemutemo waNewton:
Simba rekumanikidzwa kwetambo?
Zvichienderana negwara rekufamba kwehurongwa kana gwara rekukurumidzisa hurongwa, gwara resimba regiravhiti m2 pasi, kutungamira kwesimba rekumanikidza tambo pa m2 kumusoro:
w2 - T2 = m2 a
30 - T2 = (3)(2)
30 - T2 = 6
T2 = 30 - 6
T2 = 24 Newton
Kutungamira kwegiravhiti m1 pasi, kutungamira kwesimba rekumanikidza tambo pa m1 kumusoro:
T1 - w1 = (m1(a)
T1 – 20 = (2)(2)
T1 - 20 = 4
T1 = 4 + 20
T1 = 24 Newton
Simba rekusunga tambo (T) = T1 =T2 = MaNewton makumi mashanu.
15. Mabhuroko maviri, rimwe nerimwe rine huremu hwe4 kg, akabatanidzwa netambo nepulley sezvakaratidzwa mumufananidzo. Pamusoro nepulley zvakatsetseka. Kana bhuroko B rikadhonzwa nesimba rakatambanudzwa re50 N, kukurumidza kwebhuroko iri… (g = 10 m/s2)
A. 1,25 m/s2
B. 7,5 m/s2
C. 10 m/s2
D. 12,5 m/s2
E. 15 m/s2
Kukurukurirana
Zvinozivikanwa kuti:
mA = 4 kg, mB = 4 kg, g = 10 m/s2
wA = (mA)(g) = 4)(10) = 40 Newton
F = 50 Newton
Akabvunzwa: kukurumidza kwesystem?
Mhinduro:
Fomura yechipiri yemutemo waNewton:
Kukurumidza kwemabhuroko ese ari maviri i1,25 m/s2Kutungamira kwekufamba kwemabhuroko maviri = kutungamira kwesimba rekudhonza F.
16. Tarisa mufananidzo uri padivi! Huremu hwemabhuroko ndi m 1 = 6 kg uye m 2 = 4 kg, uye huremu hwepulley hahuna kutariswa. Kana pamusoro pendege pakatsetseka uye g = 10 ms −2 , saka kukurumidza kwehurongwa kuri….
A. 0,5 ms-2
B. 2,0 ms-2
C. 2,5 ms-2
D. 4,0 ms-2
E. 5,0 ms-2
Kukurukurirana
Zvinozivikanwa kuti:
m1 = 6 kg, m2 = 4 kg, g = 10 m/s2
w1 = m1 g = (6 kg)(10 m/s2) = 60 kg m/s2 kana makumi maviri eNewton
w2 = m2 g = (4 kg)(10 m/s2) = 40 kg m/s2 kana makumi maviri eNewton
Akabvunzwa: kukurumidza kwesystem (a)?
Mhinduro:
m1iri panzvimbo yakatsetseka, yakati sandara isina kukweshana kuitira kuti sisitimu itungamirwe ne giravhiti bhuroko rechipiri.
Terapkan Mutemo wechipiri waNewton :
∑F = ma
w2 = (m1 +m2) a
40 N = (6 kg + 4 kg) a
40 N = (10 kg) a
a = 40 N / 10 kg
a = 4 m/s2
Mhinduro chaiyo ndiD.
17. Mabhuroko maviri, rimwe nerimwe rine huremu hwe2 kg, akabatanidzwa netambo nepulley sezvakaratidzwa mumufananidzo. Pamusoro nepulley zvakatsetseka. Kana bhuroko B rikadhonzwa nesimba rakatambanudzwa re40 N, kukurumidza kwebhuroko iri… (g = 10 m/s 2 )
A. 5 m/s2
B. 7,5 m/s2
C. 10 m/s2
D. 12,5 m/s2
E. 15 m/s2
Kukurukurirana:
Zvinozivikanwa kuti:
mA = mB = 2 kg, g = 10 m/s2, F = 40 N
wA = mg = (2)(10) = 20 N
Mubvunzo: kukurumidza kwebhuroko (a)?
Mhinduro:
Pamusoro pechivharo chakatsetseka, saka simba rinokanganisa kufamba kwechivharo chete simba F uye huremu hwebhuroko A.
Shandisa mutemo wechipiri waNewton:
∑F = ma
F – wA = (mA +mB) a
40 – 20 = (2 + 2) a
20 = (4) a
a = 20 / 4
a = 5 m/s2
Mhinduro chaiyo ndiA.
Ndege yakatsamira
18. Bhokisi rine huremu hwe2 kg riri panzvimbo yakatsetseka ine kona yekutsvedza = 30o, kuitira kuti bhokisi rifambe nekukurumidzisa nguva dzose. Kana g = 10 ms-2, saka hukuru hwesimba rinofambisa bhuroko...
A. 5 N
B. 6 N
C. 7 N
D. 8 N
E. 10 N
Kukurukurirana
Zvinozivikanwa kuti:
m = 2 kg, g = 10 m/s2, theta = 30o
w = mg = (2)(10) = 20 kg m/s2 = 20N
Mubvunzo: Isimba ripi rinofambisa bhokisi?
Mhinduro:
Simba rinofambisa bhokisi iri ndi wx.
wx = w sin teta
wx = (20 N)(chivi 30o)
wx = (20 N)(0,5)
wx = 10N.
Simba rinofambisa bhokisi iri i10 Newtons.
Mhinduro chaiyo ndiE.
19. Mabhuroko maviri anobatanidzwa netambo diki inodhonzwa nesimba rakatambanuka F = 24 N. g = 10 ms-2 uye pasi pacho pari kutsvedza. Hukuru hwekumhanya kwebhuroko uchishandisa mutemo wechipiri waNewton wechinhu chimwe nechimwe ndehwekuti...
Kukurukurirana
Zvinozivikanwa kuti:
m1 = 2 kg, m2 = 4 kg, F = 24 N
Mubvunzo: Chii chinonzi kukurumidza kwebhuroko (a)?
Mhinduro:
Kukura kwekumhanya kwebhuroko iri 4 m/s2.
20. Kana uri muelevator isingachinji, huremu hwaSandi hunosvika 500 N. Kukurumidza kwesimba nekuda kwegiravhiti = 10 ms-2Kana elevator ikawedzera simba, kumanikidzwa kwetambo kunosvika 750 N. Saka, kumhanyisa elevator...
A. 5,0 ms-2
B. 7,5 ms-2
C. 10,0 ms-2
D. 12,5 ms-2
E. 15,0 ms-2
Kukurukurirana
Zvinozivikanwa kuti:
w = 500 N, g = 10 m/s2, T = 750 N
Mubvunzo: kumhanyisa elevator (a)?
Mhinduro:
Nhamba yepassword:
w = mg
500 = m (10)
m = 500 / 10
m = 50 kg
Huremu hwechikwidzo hahuzivikanwe saka huremu hwese hwechikwidzo nezvazviri = huremu hwekodhi.
Zvinoenderana nemutemo wekutanga waNewton, kana elevator ichiripo, simba rinobuda = 0.
Simba rekumanikidza retambo (T) kana chikwidzo chakamira = 500 N.
Kana elevator ikawedzera simba, simba rekusunga tambo (T) rinova 750 N kana kuwedzera ne250 N.
Kumhanya kweelevator ndeye 5 m/s2 uye nzira yekumhanyisa = nzira yekufamba kweelevator iri mudenga.
Kwakabva mubvunzo:
Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa
