Izibonelo Eziyi-10 Zemibuzo Yokucindezela
1. Ubunzima kanye nomthamo wamabhulokhi amane angezansi kuyafana, ngakho-ke ingcindezi encane kakhulu phansi ikhishwa inombolo yento...
A. Mina
B. II
C. III
D. IV
Ingxoxo
Ifomula yokucindezela:
P = F / A
Ngokusekelwe kule fomula, kuphethwa ngokuthi ingcindezi (P) ilingana ngqo namandla (F) futhi ilingana ngokuphambene nendawo yobuso (A). Lokhu kusho ukuthi uma amandla emakhulu, ingcindezi nayo inkulu, futhi uma indawo yobuso inkulu, ingcindezi nayo incane.
Ngokusekelwe esithombeni, indawo enkulu kunazo zonke ethintana nephansi yinto III ukuze le nto isebenzise ingcindezi encane kakhulu phansi.
Impendulo efanele ngu-C.
2. Uma isisindo sonxantathu abane ngezansi sifana, ingcindezi enkulu endaweni yengcindezi iboniswa yisithombe...
Ingxoxo
Ifomula yokucindezela:
P = F / A = w / A
Ulwazi: P = ingcindezi, F = amandla, w = amandla adonsela phansi , A = indawo engaphezulu ethinta phansi.
Ngokusekelwe kule fomula, kungaphethwa ngokuthi ingcindezi ilingana ngqo namandla adonsela phansi futhi ilingana ngokuphambene nendawo ethinta phansi. Ngakho-ke, lapho amandla adonsela phansi emakhulu, ingcindezi iba nkulu, futhi lapho indawo ethinta phansi incane, ingcindezi iba nkulu.
Uma isisindo sabo bonke onxantathu abane sifana, khona-ke amandla adonsela phansi kubo bonke onxantathu abane afana. Ngakho-ke, ingcindezi incike endaweni engaphezulu ethinta phansi, lapho indawo encane kakhulu ebusweni inokucindezela okukhulu.
Impendulo efanele ingu-B.
3. Ingcindezi enkulu kakhulu iboniswe esithombeni...
Ingxoxo
Ifomula yokucindezela:
P = F / A = w / A
Ulwazi: P = ingcindezi, F = amandla, w = amandla adonsela phansi, A = indawo engaphezulu ethinta phansi.
Ngokusekelwe kule fomula, kungaphethwa ngokuthi ingcindezi ilingana ngqo namandla adonsela phansi futhi ilingana ngokuphambene nendawo ethinta phansi. Ngakho-ke, lapho amandla adonsela phansi emakhulu, ingcindezi iba nkulu, futhi lapho indawo ethinta phansi incane, ingcindezi iba nkulu.
Uma isisindo sazo zonke izinto ezine sifana, khona-ke amandla adonsela phansi kuzo zonke izinto ezine afana. Ngakho-ke, ingcindezi incike endaweni engaphezulu ethinta phansi, lapho indawo encane kakhulu ebusweni inokucindezela okukhulu.
Impendulo efanele ngu-D.
4. Amandla angu-500 N asebenza endaweni engaphezulu engu-2,5 m2 . Ingcindezi ingu…
A. 20 Pa
B. 200 Pa
C. 2000 Pa
D. 2 Pa
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Kuyaziwa ukuthi:
Amandla (F) = 500 Newton
Indawo engaphezulu (A) = 2,5 square metres
Kubuziwe: Ukucindezela (P)
Impendulo:
Ukucindezela (P):
P = F / A
P = 500 / 2,5
P = 200 N/m 2
P = 200 Pascal
Impendulo efanele ingu-B.
5. Amandla angu-500 N asebenza endaweni engaphezulu engu-2,5 m2 . Ingcindezi ingu…
A. 20 Pa
B. 200 Pa
C. 2000 Pa
D. 2 Pa
Ingxoxo
Kuyaziwa ukuthi:
Amandla (F) = 500 Newton
Indawo engaphezulu (A) = 2,5 square metres
Kubuziwe: Ukucindezela (P)
Impendulo:
Ukucindezela (P):
P = F / A
P = 500 / 2,5
P = 200 N/m 2
P = 200 Pascal
Impendulo efanele ingu-B.
6. Bheka isithombe esilandelayo! Isisindo sebhokisi = 75 kg kanye nokusheshisa okubangelwa amandla adonsela phansi g = 10 m/s 2 . Ingcindezi ekhishwa yisisekelo sebhokisi...
A. 150 N/m2
B. 125 N/m 2
C. 75 N/m 2
D. 25 N/m 2
Ingxoxo
Kuyaziwa ukuthi:
Isisindo sebhokisi (m) = 75 kg
Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s 2
Amandla adonsela phansi (w) = mg = (75 kg)(10 m/s 2 ) = 750 kg m/s 2 = 750 amaNewton
Indawo engaphezulu kwesisekelo sebhokisi (A) = amamitha ayi-6 x amamitha ayi-5 = amamitha-skwele angama-30
Kubuziwe: Ingcindezi ekhishwa phansi kwebhokisi
Impendulo:
Ingcindezi ekhishwa phansi kwebhokisi:
P = F/A = w/A = 750/30 = 25 N/m 2
Impendulo efanele ngu-D.
7. Ibhokisi lekhadibhodi eliqukethe umango linobunzima obungama-24 kg futhi libekwa phansi futhi ubukhulu balo bunjengoba buboniswe esithombeni (g = 10 m/s2 ) . Ingcindezi ekhishwa ibhokisi lekhadibhodi phansi ingu….
A. 600 N/m2
B. 1000 N/m 2
C. 1200 N/m 2
D. 2400 N/m 2
Ingxoxo
Kuyaziwa ukuthi:
IMisa (m) = 24 kg
Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s 2
Isisindo (w) = mg = (24 kg)(10 m/s 2 ) = 240 kg m/s 2 = 240 amaNewton
Indawo engaphezulu ethinta phansi (A) = 1 m x 0,4 m = 0,4 m 2
Umbuzo: Ingakanani ingcindezi ekhishwa yikhadibhodi phansi?
Impendulo:
Ifomula yokucindezela:
P = F / A = w / A
Incazelo yefomula: P = ingcindezi, F = amandla, w = amandla adonsela phansi, A = indawo engaphezulu
Inani lokucindezela elikhishwa yikhadibhodi phansi:
P = 240 N / 0,4 m 2 = 600 N/m 2
Impendulo efanele ngu-A.
8. Amabhulokhi amane afanayo anobunzima obufanayo abekwa phansi elifanayo endaweni eboniswe esithombeni. Ingcindezi enkulu kakhulu etholwa phansi iboniswe esithombeni...
Ingxoxo
Ifomula yokucindezela :
P = F / A = w / A
Ulwazi: P = ingcindezi, F = amandla, w = amandla adonsela phansi, A = indawo engaphezulu.
Ngokusekelwe kufomula yokucindezela, kuphethwa ngokuthi ingcindezi ilingana namandla futhi ilingana ngokuphambene nendawo yobuso. Uma amandla emaningi, ingcindezi iba nkulu. Uma indawo yobuso inkulu, ingcindezi iba ncane.
Ubuningi bamabhulokhi buyafana, ngakho-ke isisindo sawo siyafana. Ngakho-ke, inani lokucindezela enkingeni engenhla linqunywa indawo engaphezulu ethintana nephansi (indawo eyisisekelo). Ukucindezela okukhulu okubonwa yiphansi kubangelwa yibhulokhi enendawo encane kakhulu eyisisekelo.
Indawo engaphezulu kwebhulokhi A = (2 cm)(4 cm) = 8 cm2
Indawo engaphezulu kwebhulokhi B = (4 cm)(4 cm) = 16 cm2
Indawo engaphezulu kwebhulokhi C = (4 cm)(3 cm) = 12 cm2
Indawo engaphezulu kwe-cuboid D = (3 cm)(3 cm) = 9 cm2
Impendulo efanele ngu-A.
9. Amabhulokhi amane anobunzima obufanayo abekwa phansi elifanayo. Ibhulokhi elinomfutho omncane kakhulu phansi yi…
Ingxoxo
Ubuningi bamabhulokhi buyafana, ngakho-ke isisindo sawo siyafana. Ngakho-ke, inani lokucindezela enkingeni engenhla linqunywa indawo engaphezulu yebhulokhi ethintana nephansi (indawo eyisisekelo). Ukucindezela okuncane kakhulu okubonwa yiphansi kubangelwa yibhulokhi enendawo enkulu kunazo zonke eyisisekelo.
Indawo engaphezulu kwebhulokhi A = (2 cm)(2 cm) = 4 cm2
Indawo engaphezulu kwebhulokhi B = (1 cm)(3 cm) = 3 cm2
Indawo engaphezulu kwebhulokhi C = (4 cm)(2 cm) = 8 cm2
Indawo engaphezulu kwe-cuboid D = (4 cm)(4 cm) = 16 cm2
Impendulo efanele ngu-D.
10. Bheka isithombe esilandelayo! Ibhulokhi ngayinye inobunzima obufanayo. Ingcindezi encane kakhulu ebusweni bokucindezela ikwibhulokhi…
Ingxoxo
Ubunzima bamabhulokhi buyafana ngakho isisindo samabhulokhi siyafana. Ingcindezi encane kakhulu endizeni yokucindezela itholakala ukuthi ibangelwa umsebe onendawo enkulu kunazo zonke eyisisekelo.
Indawo engaphezulu kwebhulokhi A = (4 cm)(2 cm) = 8 cm2
Indawo engaphezulu kwebhulokhi B = (3 cm)(2 cm) = 6 cm2
Indawo engaphezulu kwebhulokhi C = (4 cm)(1 cm) = 4 cm2
Indawo engaphezulu kwe-cuboid D = (2 cm)(2 cm) = 4 cm2
Impendulo efanele ngu-A.
Umthombo wombuzo:
Imibuzo Yokuhlolwa Kazwelonke Yesayensi Yesikole Samabanga Aphansi/Isikole SamaSulumane Samabanga Aphakeme
