6 Uhlelo Lwamazwe Ngamazwe Lwamayunithi Iziqalo Zeyunithi – Izinkinga Nezixazululo
Uhlelo Lwamazwe Ngamazwe Lwamayunithi
1. Yimaphi amayunithi alandelayo angeyona iyunithi yobude
A. Amamayela
B. Unyawo
C. Inch
D. Ifindo
Isixazululo:
Amamayela, izinyawo, nama-intshi kuyizilinganiso zobude.
Ifindo liyunithi yejubane noma ijubane.
Impendulo efanele ngu-D.
2. Thola iyunithi yohlelo lwamazwe ngamazwe lwe -modulus kaYoung
A. kg.m/s 2
B. kg/ms 2
C. m/kg.s 2
D. kg.s 2 /m
Kwaziwa:
Iyunithi yamandla = kg m/s 2
Iyunithi yendawo = m 2
Iyunithi yobude = m
Okufunwayo: Amayunithi ohlelo lwamazwe ngamazwe lwe- modulus ka- Young.
Isixazululo:
Impendulo efanele ingu- B.
3. Inani linamayunithi kg.m -1 .s -2 …
A. Ukucindezela
B. Amandla
C. Umfutho
D. Ukusheshisa
Isixazululo:
Ukucindezela = Amandla / Indawo
Iyunithi yamandla yamazwe ngamazwe yi -kg m/s 2
Iyunithi yomhlaba wonke yendawo ingu - m2
Iyunithi yomhlaba wonke yokucindezela = kg /ms 2 = kg m -1 s -2
Amandla = Umsebenzi
Umsebenzi = Amandla x Ukufuduka
Iyunithi yamandla yamazwe ngamazwe iyi -kilogram imitha ngomzuzwana isikwele (kg m/s 2 )
Iyunithi yamazwe ngamazwe yokufuduka iyimitha (m)
Ngakho-ke, iyunithi yamandla yamazwe ngamazwe = iyunithi yomsebenzi = kg m 2 /s 2 = kg m 2 s -2
Umfutho = Isisindo x ijubane
Iyunithi yomhlaba wonke yobunzima yi -kg
Iyunithi yejubane yamazwe ngamazwe yi -m/s
Ngakho-ke, iyunithi yamazwe ngamazwe yomfutho ingu- kg m/s = kg ms -1
Ukusheshisa = ijubane / isikhawu sesikhathi
Iyunithi yejubane yamazwe ngamazwe iyimitha / isekhondi (m/s)
Iyunithi yesikhathi yamazwe ngamazwe ingeyesibili (s)
Ngakho-ke, iyunithi yamazwe ngamazwe yokusheshisa ingu- m/s: s = m/sx 1/s = m/s 2 = ms -2
Impendulo eyiyo ngu-A.
4. Iyunithi yamandla yamazwe ngamazwe …
A. kg m 2 s -2
B. kg m 2 s -3
C. g cm 2 s -1
D. g cm s -3
Isixazululo:
Amandla = Umsebenzi / isikhathi
Iyunithi yomsebenzi yamazwe ngamazwe iyi- kilogram imitha eyisikwele ngomzuzwana ngamunye eyisikwele (kg m2 / s2 )
Iyunithi yesikhathi yamazwe ngamazwe i- se cond (s)
Ngakho-ke, iyunithi yamandla yi- kg m 2 /s 3 = kg m 2 s -3
Impendulo efanele ingu- B.
Iziqalo Zeyunithi
5. Ukuhleleka kwesiqalo samayunithi kusukela kokukhulu kuya kokuncane okulungile ngu …
A. I-Mega, i-tera, i-nano, i-pico
B. Giga, Mega, Micro, nano
C. Pico, Nano, Mega, Tera
D. Mega, Tera, Micro, Pico
Isixazululo:
Impendulo efanele ingu- B.
6. Ikhulu elincane lifana ne….
A. Ihora eli-1
B. imizuzu engama-90
C. 52 amamitha ama-inutes
D. 4000 se conds
Kwaziwa:
Usuku olu-1 = amahora angama-24
Ihora eli-1 = imizuzu engama-60
Umzuzu owodwa = imizuzwana engama-60
Usuku olu-1 = imizuzu engama -24 x 60 = imizuzu eyi -1440
Usuku olu-1 = 1440 x 60 imizuzwana = 86,400 imizuzwana
Okufunwayo: 1 mi cro ro century = …….. amahora = …….. imizuzu = …….. imizuzwana
Isixazululo:
I- micron eyi-1 = 10 -6
Ikhulu eli-1 le-cro ro = amakhulu ayi-10 -6 = amakhulu ayi- 0.000,001
Ikhulu eli-1 = iminyaka eyi -100 = iminyaka eyi -100 x 365 = iminyaka engama- 36,500
Ikhulu eli-1 le -cro = 0.000,001 x izinsuku ezingu -36,500 = izinsuku ezingu -0.0365
1 mi c ro century = 0.0365 x amahora angu -24 = amahora angu -0.876
Ikhulu eli -1 le -cro ro = 0.876 x imizuzu engama-60 = imizuzu engama -52.56
Ikhulu eli -1 le - cro ro = 52.56 x 60 imizuzwana = 3153.6 imizuzwana
Impendulo efanele ngu -C.
