Imibuzo eyi-7 Ibhizinisi
1. Bheka isithombe esilandelayo!
Inani lomsebenzi owenziwe ebhlokini...
A. 3 Joule
B. 8 Joule
C. 16 Joule
D. 48 Joule
Ingxoxo
Kuyaziwa ukuthi:
Amandla (F) = 12 Newton
Ukufuduka (ama) = amamitha ama-4
Kubuziwe: Umzamo (W)
Impendulo:
Esithombeni esingenhla, ukufuduka kwento kusendleleni efanayo namandla. Ifomula yokusebenza yalesi simo ithi:
W = F s = (12 Newton)(amamitha ayi-4) = 48 amamitha Newton = 48 Joules
Impendulo efanele ngu-D.
2. Ibhlokhi lokhuni licindezelwa ngamandla angu-200 N ukuze lihambe ibanga elingamamitha amabili, umsebenzi owenziwa yibhlokhi lokhuni...
A. 20 J
B. 100 J
C. 200 J
D. 400 J
Ingxoxo
Kuyaziwa ukuthi:
Amandla (F) = 200 Newton
Ukufuduka (ama) = amamitha ama-2
Kubuziwe: Umzamo (W)
Impendulo:
Ibhizinisi:
W = F s
W = (200 Newton)(amamitha ama-2)
W = 400 amamitha e-Newton
W = 400 Joule
Impendulo efanele ngu-D.
3. Bheka isithombe!
Umshayeli we-sedan ufuna ukupaka imoto yakhe ngqo 0,5 m phambi kweloli elaliqhele ngamamitha ayi-10 ekuqaleni. I-sedan izodinga umzamo ongakanani?
A. 525 J
B. 500 J
C. 495 J
D. 475 J
Ingxoxo
Kuyaziwa ukuthi:
Ukufuduka (abantu) = amamitha ayi-10 – amamitha angu-0,5 = amamitha angu-9,5
Amandla (F) = 50 Newton
Kubuziwe: Umzamo (W)
Impendulo:
Ifomula yebhizinisi:
W = F s
W = (50 Newton)(amamitha ama-9,5)
W = 475 amamitha e-Newton
W = 475 Joule
Impendulo efanele ngu-D.
4. Bheka isithombe!
Umzamo owenziwe ngu-Andi noToni wokuhambisa imoto ngamamitha angu-4 uma amandla ezingane ezimbili engama-N angu-50 kanye nama-N angu-70 ngokulandelana...
A. Ama-joule angu-80
B. ama-joule ayi-200
C. 280 ama-joule
D. 480 ama-joule
Ingxoxo
Kuyaziwa ukuthi:
Ukufuduka (ama) = amamitha ama-4
Amandla aphumelayo (F) = 50 Newtons + 70 Newtons = 120 Newtons
Kubuziwe: Umzamo (W)
Impendulo:
Ibhizinisi:
W = F s = (120 Newton)(amamitha ayi-4) = 480 amamitha Newton = 480 Joules
Impendulo efanele ngu-D.
5. Umshayeli udonsa imoto emile njengoba kuboniswe esithombeni, ukuze imoto ihambe ibanga elingamasentimitha ayi-1.000. Inani lomsebenzi owenziwe li…..
A. 250 Joule
B. 1.000 Joule
C. 2.500 Joule
D. 250.000 Joule
Ingxoxo
Kuyaziwa ukuthi:
Yisho wonke amayunithi ohlelweni lwamazwe ngamazwe
Amandla (F) = 250 Newton
Ukufuduka (ama) = 1000 cm = 1000/100 amamitha = 10 amamitha
Umbuzo: Inani lomzamo (W)
Impendulo:
Ifomula yebhizinisi:
W = F s = (250 Newton)(amamitha ayi-10) = 2500 amamitha Newton = 2500 Joules
Impendulo efanele ngu-C.
6. Bheka isithombe esilandelayo sokunyakaza kwezinto!
Uma umsebenzi owenziwa yile mandla entweni ungama-375 Joules, into ingahamba ibanga...
A. amamitha angu-7,5
B. 15 amamitha
C. amamitha ayi-22,5
D. amamitha ayi-25
Ingxoxo
Kuyaziwa ukuthi:
Umsebenzi (W) = ama-Joules angu-375
Amandla aphumelayo ( ΣF) = 40 N + 10 N – 25 N = 25 Newtons (ngakwesokudla)
Kubuziwe: Ukufuduka (abantu)
Impendulo:
Ifomula yebhizinisi:
W = F s
Ukufuduka:
s = W / F = 375 Joules / 25 Newtons
s = amamitha angu-15
Impendulo efanele ingu-B.
7. Imisebenzi yabanye babantwana abangezansi engabandakanyi ukwenza ibhizinisi...
A. ngisunduza inqola yenyama ngamamitha ayi-10
B. ukusunduza imoto emile kuze kube yilapho ihamba
C. ukusunduza udonga oluqinile uze ujuluke
D. Ukugibela ibhayisikili ukusuka ekhaya ukuya esikoleni
Ingxoxo
Ifomula yebhizinisi:
W = ΣF s
Ulwazi: W = umzamo noma umsebenzi, F = amandla, s = ukufuduka
Ngokusekelwe kufomula engenhla, kukhona umsebenzi uma kukhona amandla futhi kukhona ukufuduka (kukhona ukunyakaza).
Impendulo efanele ngu-C.
Umthombo wombuzo:
Imibuzo Yokuhlolwa Kazwelonke Yesayensi Yesikole Samabanga Aphansi/Isikole SamaSulumane Samabanga Aphakeme
