Umshini olula o-6 (I-Inclined plane Lever) – Izinkinga Nezixazululo
1.
Yiliphi indiza elithambekele elinenzuzo efanayo yomshini
A. (1) kanye no-(2)
B. (1) kanye no-(3)
C. (2) kanye no-(3)
D. (2) kanye (4)
Isixazululo
Indiza ethambekele ingenye yemishini elula. Imishini elula ingamathuluzi asiza abantu ukwenza umsebenzi. Indiza ethambekele isetshenziselwa ukwenza kube lula ngabantu ukuphakamisa into iye endaweni ethile ephakeme.
Inzuzo yomshini wendiza ethambekele ukuqhathanisa ubude bokuthambekela nokuphakama kokuthambekela.
Inzuzo yomshini wendiza ethambekele 1 = 50 cm / 30 cm = 5/3
Inzuzo yomshini yendiza ethambekele 2 = 5 cm / 4 cm = 5/4
Inzuzo yomshini wendiza ethambekele 3 = 50 cm / 40 cm = 5/4
Inzuzo yomshini yendiza ethambekele 4 = 5 cm / 3 cm = 5/3
[irp]
2.
Ibanga AB = BC = CD = DE, nquma amandla okufaka okumele anikezwe endaweni E ukuze kube ne-lever elinganisiwe.
Kwaziwa:
AB = BC = CD = DE = l
Ibanga phakathi kwamandla okukhipha kanye ne-fulcrum ( a ) = l
Ibanga phakathi kwamandla okufaka kanye ne-fulcrum ( b ) = 3l
Amandla okukhipha (w) = 900 Newton
Kufunwa: Amandla (F)
Isixazululo:
Inzuzo yobuchwepheshe:
I-MA = b / a = 3l/l = 3
Ubukhulu bamandla:
I-MA = w / F
F = w / MA
F = 900 Newtons / 3
F = 300 Newton
[irp]
3.
Ukuze i-lever ilinganiswe, nquma ubukhulu bamandla ayo okufaka.
Isixazululo
Nquma ibanga phakathi kwamandla okufaka kanye ne-fulcrum ( b )
Kwaziwa:
Ibanga phakathi kwamandla okukhipha kanye ne-fulcrum ( a ) = 25 cm
Amandla okukhipha (w) = 480 Newton
Amandla okufaka (F) = 160 N
Okufunwayo: Ibanga eliphakathi kwamandla okufaka kanye ne-fulcrum (b)
Isixazululo:
Inzuzo yobuchwepheshe:
MA = w / F = 480 N / 160 N = 3
Ibanga phakathi kwamandla okufaka kanye ne-fulcrum (b)
I-MA = b / a
3 = b / 25 cm
b = (3)(25 cm)
b = 75 cm
Thola ubukhulu bamandla (F)
Kwaziwa:
Ibanga phakathi kwamandla okukhipha kanye ne-fulcrum ( a ) = 25 cm – 10 cm = 15 cm
Isisindo sento (w) = 480 Newtons
Ibanga phakathi kwamandla okufaka kanye ne-fulcrum ( b ) = 75 cm
Okufunwayo: Amandla okufaka (F)
Isixazululo:
Inzuzo yemishini:
I-MA = b / a
I-MA = 75 cm / 15 cm
I-MA = 5
Ubukhulu bamandla (F):
I-MA = w / F
F = w / MA
F = 480 Newtons / 5
F = 96 Newton
Ukuze i-lever ibe sesimweni esilinganiselayo khona-ke amandla okufaka ancishisiwe ngo-64 Newton (160 N - 96 N).
4. Isilinganiso sobude buka-a no-b esithombeni esingezansi singu-a: b = 1: 2.2. Inani eliphansi lamandla u-F okuphakamisa into u-B enesisindo sama-Newton angu-330…. uNewton
A. 100
B. 150
C. 2200
D. 7260
Kwaziwa:
Ibanga phakathi kwamandla okukhipha kanye ne-fulcrum ( a ) = 1
Ibanga phakathi kwamandla okufaka kanye ne-fulcrum (b) = 2.2
Isisindo (w) = 330 Newton
Okufunwayo: Amandla okufaka (F)
Isixazululo:
Izinzuzo zomshini we-lever:
MA = w / F = b / a
I-MA = inzuzo yemishini , w = isisindo, F = amandla okufaka, b = ibanga phakathi kwamandla okufaka kanye ne-fulcrum, a = ibanga phakathi kwamandla okukhipha kanye ne-fulcrum
w / F = b / a
330 / F = 2.2 / 1
330 / F = 2.2
330 / 2.2 = F
F = 150 Newton
Impendulo efanele ngu-B.
5. Umfundi usunduza into ngamandla ka-F kusukela endaweni A kuya endaweni B, njengoba kuboniswe esithombeni esingezansi. Uma ukungqubuzana phakathi kwento nengulube kunganakwa, thola inzuzo yomshini.
A. 4
B. 5/3
C. 5/4
D. ¾
Kwaziwa:
Ukuphakama kwendiza ethambekele (y) = amamitha angu-4 – amamitha angu-1 = amamitha angu-3
Ubude bendiza evundlile (x) = amamitha angu-4
Okufunwayo: Inzuzo yemishini (MA)
Isixazululo:
Bala ubude bendiza ethambekele usebenzisa i-equation kaPythagoras :
R = √3 2 +4 2 = √9+16 = √25 = 5 amamitha
Izinzuzo zemishini zendiza ethambekele:
KM = R / y
KM = amamitha angu-5 / amamitha angu-3
I-KM = 5/3
Impendulo efanele ngu-B.
6. Inzuzo yomshini we-lever ingandiswa ngo…
A. Fushanisa indlela yokuthambekela
B. khulisa i-engeli yokuthambekela
C. nciphisa i-engeli yokuthambekela
D. kunciphisa amandla asetshenziswa ukuhambisa izinto
Isixazululo:
Isibalo senzuzo yomshini yendiza ethambekele:
Inzuzo yemishini = ubude bendiza ethambekele/ukuphakama bendiza ethambekele
– Inzuzo yomshini ilingana ngqo nobude bendiza ethambekele ngakho-ke inzuzo yomshini iyanda uma ubude bendiza ethambekele buyanda.
– Inzuzo yomshini ilingana ngokuphambene nokuphakama kwendiza ethambekele, ngakho-ke, inzuzo yomshini incishiswa uma ukuphakama kwendiza ethambekele kukhushulwa futhi inzuzo yomshini ikhushulwa uma ukuphakama kwendiza ethambekele kuncishiswa.
- Uma i-engeli incishisiwe khona-ke ukuphakama kwendiza ethambekele kuyancishiswa. Inzuzo yomshini iyandiswa uma ukuphakama kwendiza ethambekele kuncishisiwe. Ngakho-ke uma i-engeli incishisiwe khona-ke inzuzo yomshini iyandiswa.
Uma i-engeli ikhulisiwe khona-ke ukuphakama kwendiza ethambekele kuyakhuliswa. Inzuzo yomshini incishiswa uma ukuphakama kwendiza ethambekele kukhuliswa. Ngakho-ke uma i-engeli ikhulisiwe khona-ke inzuzo yomshini incishiswa.
Impendulo efanele ithi C.
