Mienzaniso gumi nemaviri yemibvunzo iri nyore yemuchina
1. Tarisa mufananidzo wepulley yakagadzika padivi! Kuti uisimudze, simba F rinodiwa.
yakakura se…
A. 50 N
B. 100 N
C. 200 N
D. 1000 N
Kukurukurirana
Kurema kwemutoro = maNewton zana. Kuti mutoro usimudzwe, simba risingapfuure maNewton zana rinodiwa.
Mhinduro chaiyo ndeiyi B.
2. Tarisa mufananidzo!
Chinhu chakanaka chemuchina uyu ndechekuti…
A. 1
B. 1,5
C. 2,5
D. 10
Kukurukurirana
Zvinozivikanwa kuti:
Kurema (w) = 75 Newtons
Simba (F) = 7,5 Newtons
Ruoko rweSimba (LK) = 50 cm
Ruoko Runotakura Mutoro (LB) = 5 cm
Yabvunzwa: Kubatsira kwemuchina (KM)
Mhinduro:
Fomura yekubatsira kwemuchina we lever:
KM = w / F kana KM = LK/LB
Ruzivo: KM = mukana wekushandisa michina, w = uremu hwemutoro, F = simba, LK = ruoko rwesimba, LB = ruoko rwemutoro.
Kubatsira kwemuchina we lever kunoverengerwa uchishandisa fomura iri pamusoro apa:
KM = w/F = 75 Newtons / 7,5 Newtons = 10 kana
KM = LK/LB = 50 cm /5 cm = 10
Mhinduro chaiyo ndiD.
3. Tarisa mufananidzo unotevera we lever!
Simba rekusimudza dombo rakakura sei…
A. 2.250 Newtons
B. 1.500 Newtons
C. 750 Newton
D. 500 Newton
Kukurukurirana
Zvinozivikanwa kuti:
Kurema kwemutoro (w) = 1500 Newton
Ruoko rwemutoro (Lb) = 0,5 metres
Ruoko rwesimba (Lk) = 1,5 metres
Akabvunzwa: Simba (F)
Mhinduro:
Fomura yekubatsira kwemuchina we lever:
Km = w / F kana Km = Lk/Lb
Tsananguro yefomura:
Km = mukana wekushandisa michina, w = uremu hwemutoro, F = simba, Lk = ruoko rwesimba, Lb = ruoko rwemutoro.
Kubatsira kwemuchina:
Km = Ruka/Kureba = 1,5/0,5 = 3
Maitiro makuru:
Km = w / F
F = w / Km
F = 1500 Newtons / 3
F = 500 Newton
Mhinduro chaiyo ndiD.
4. Tarisa mufananidzo!
Pamichina mina iri pamusoro apa, inoshandisa musimboti wekuti plane yakatsamira ndeiyi...
A. 1 ne2
B. 1 ne3
C. 2 ne3
D. 3 ne4
Kukurukurirana
Muchina uri nyore chishandiso chinoshandiswa kuita kuti basa revanhu rive nyore. Semuenzaniso, kana uchinetseka kusimudza chinhu kusvika pakakwirira, plane yakakombama inogona kushandiswa. Kusunda chinhu paplane yakakombama kunoda simba shoma pane kuchisimudza zvakananga. Muchiitiko ichi, chinhu chinofamba nepo plane yakakombama ikaramba yakamira.
Ndege yakakotama iri pamufananidzo uri pamusoro apa ndiyo ndege yakatsamira iyo ichiripo. Kune mapurani akarerekera ayo ari michina iri nyore kufamba, kureva masikuruu (1) uye ma wedges. Mienzaniso yema wedges idemo (2), mapanga nema chisel. Muchiitiko ichi, chinhu chacho chichiripo apo purani yakarerekera inofamba.
Mhinduro chaiyo ndiA.
5. Muchina unotevera uri nyore unoshandisa musimboti we lever ndeuyu...
Kukurukurirana
Rumwe rudzi rwemuchina uri nyore isimbi. Simba resimbi chishandiso chinowedzera simba, uko simba rinogadzirwa rakakura kupfuura simba rinoburitswa. Kune mhando nhatu dzesimbi, dzinoti simba resimbi rekirasi yekutanga, simba resimbi rekirasi yechipiri uye simba resimbi rekirasi yechitatu. Hunhu hwesimbi resimbi rekirasi yekutanga ndehwekuti simba riri pakati pesimba nemutoro, semuenzaniso chigero nepliers. Hunhu hwesimbi resimbi rekirasi yechipiri ndehwekuti mutoro uri pakati pesimbi nesimba, semuenzaniso chidhonza-nail uye stapler. Hunhu hwesimbi resimbi rekirasi yechitatu ndehwekuti simba riri pakati pemutoro nesimbi, semuenzaniso bhurasho.
Mufananidzo B muenzaniso we lever yechipiri, apo mutoro uri pakati pe fulcrum (vhiri) nesimba (simba rekusimudza nesimba rinosunda remunhu).
Mhinduro chaiyo ndeiyi B.
6. Muchina uri nyore unotevera une musimboti wekushanda wakafanana nemuchina uri nyore uri pamusoro apa, kureva kuti...
Kukurukurirana
Muchina uri nyore uri mumufananidzo uri pamusoro apa isimbi. Simba rinosimudzira simba, uko simba rinobuda riri guru pane simba rinoshandiswa. Kune mhando nhatu dzesimbi dzinoshandisa simba: simba remhando yekutanga, simba remhando yechipiri, uye simba remhando yechitatu.
Hunhu hwechikwambo chemhando yepamusoro ndechekuti chikamu chakabatana chiri pakati pesimba nemutoro, semuenzaniso zvikwambo, chigero nepliers.
Hunhu hwechitsiko chemhando yechipiri ndechekuti mutoro uri pakati pechikamu chesimba nechisimba, semuenzaniso chidhonza-nail uye chinobatanidza.
Hunhu hwechibato chechitatu ndechekuti simba riri pakati pemutoro nechikamu chesimba, semuenzaniso bhurashi.
Mufananidzo uri pamusoro apa isimbi inopinza uye muchina uri nyore unoshanda nenzira imwecheteyo sesimbi inopinza chigero.
Mhinduro chaiyo ndiC.
7. Tarisa mutambo we seesaw sezvakaratidzwa mumufananidzo unotevera!
Huremu hwemwana A hwakakura kupfuura hwemwana B. Kuti seesaw ienzane, nzvimbo chaiyo ndiyo...
A. Chikamu chakazara T chinoshandurwa kuenda kupoindi P
B. Mwana B anoenda kupoindi R
C. Mwana A anoenda kupoindi P
D. Mwana B anoenda kupoindi Q
Kukurukurirana
Seesaw muenzaniso wemuchina uri nyore kushandisa. Nzira yekubatsira kwayo muchina ndeiyi:
KM = w lb = F lk
Information :
KM = mukana wekushandisa michina,
w = mutoro
lb = ruoko rwekutakura = chinhambwe chiri pakati pemutoro nechikamu chechikamu. Chikamu chechikamu chiri mumufananidzo ndiT
F = simba
lk = ruoko rwesimba = chinhambwe chiri pakati pesimba nechikamu chechikamu. Chikamu chechikamu chiri mumufananidzo ndiT
Zvichibva pafomura iri pamusoro apa, kuitira kuti chigadzirwa chemutoro (w) neruoko rwemutoro (lb) chive chakafanana nechibereko chesimba (F) neruoko rwemutoro (lk), saka kana mutoro wacho wakakura uye simba racho riri diki, ruoko rwemutoro (lb) runofanira kuva diki uye ruoko rwemutoro (lk) runofanira kuva rukuru.
Tarisa mufananidzo uri pamusoro apa. Kana A iri mutoro mukuru uye B iri simba diki, kuenzana kunoitika kana ruoko rwemutoro rwuri diki uye ruoko rwesimba rwakakura.
Ruoko rwemutoro runova rudiki mushure mekunge mwana A achinja kuenda kuP.
Mhinduro chaiyo ndiC.
8.
Tarisa mufananidzo uri pazasi!
Pamapurani mana akarerekera pamusoro, rimwe rine mukana wakafanana wekugadzira zvinhu rinoratidzwa munhamba yemufananidzo….
A. (1) na (2)
B. (1) uye (3)
C. (2) uye (4)
D. (3) na (4)
Kukurukurirana
Ndege yakakombama muchina uri nyore. Michina yakakombama zvishandiso zvinobatsira vanhu kuita mabasa. Ndege dzakakombama dzinoshandiswa kuita kuti zvive nyore kuti vanhu vasimudze zvinhu kusvika pakakwirira.
Chinhu chakanaka chemuchina wendege yakakombama ihuremu hwehurefu hwendege yakakombama kusvika pahurefu hwendege yakakombama.
Kubatsira kwemuchina wendege yakatsamira 1 = 5 cm / 2 cm = 2,5
Kubatsira kwemuchina wendege yakatsamira 2 = 3 cm / 2 cm = 1,5
Kubatsira kwemuchina wendege yakatsamira 3 = 3 cm / 1 cm = 3
Kubatsira kwemuchina wendege yakatsamira 4 = 12 cm / 4 cm = 3
Kubatsira kwakafanana kwemuchina kunoratidzwa nemifananidzo (3) na (4).
Mhinduro chaiyo ndiD.
9.
Mamwe mapuraneti akarerekera ane saizi yakafanana nemufananidzo.
Iyo ine mukana wakafanana wekugadzira ndiyo plane yakatsamira….
A. (1) na (2)
B. (1) uye (3)
C. (2) uye (4)
D. (3) na (4)
Kukurukurirana
Kubatsira kwemuchina wekufamba kwakatsveyama 1 = 3,2 m / 80 cm = 320 cm / 80 cm = 4
Kubatsira kwemuchina wekufamba kwakatsveyama 2 = 3,6 m / 90 cm = 360 cm / 90 cm = 4
Kubatsira kwemuchina wekufamba kwakatsveyama 3 = 3 m / 120 cm = 300 cm / 120 cm = 2,5
Kubatsira kwemuchina wekufamba kwakatsveyama 4 = 4 m / 125 cm = 400 cm / 125 cm = 3,2
Kubatsira kwakafanana kwemuchina kunoratidzwa nemifananidzo (1) na (2).
Mhinduro chaiyo ndiA.
10.
Tarisa mufananidzo unotevera wendege yakakotama!
Ndege yakakotama ine mukana wakafanana newayo ndeiyi….
A. (1) na (2)
B. (1) uye (3)
C. (2) uye (3)
D. (3) na (4)
Kukurukurirana
Kubatsira kwemuchina wendege yakatsamira 1 = 3 m / 1,2 m = 2,5
Kubatsira kwemuchina wendege yakatsamira 2 = 5 m / 2 m = 2,5
Kubatsira kwemuchina wendege yakatsamira 3 = 4 m / 1,5 m = 2,6
Kubatsira kwemuchina wendege yakatsamira 4 = 3,6 m / 1,2 m = 3
Kubatsira kwakafanana kwemuchina kunoratidzwa nemifananidzo (1) na (2).
Mhinduro chaiyo ndiA.
11. Michina iri nyore
Tarisa mufananidzo unotevera we lever.
Daro AB = BC = CD = DE, huwandu hwesimba rinofanira kushandiswa kunongedzo E kuitira kuti lever ienzane ndi…
A. 300 N
B. 450 N
C. 750 N
D. 900 N
Kukurukurirana
Zvinozivikanwa kuti:
AB = BC = CD = DE = l
Ruoko rwemutoro (Lb) = l
Ruoko rwesimba (Lk) = 3l
Kurema kwemutoro (w) = 900 Newton
Akabvunzwa: Simba (F)
Mhinduro:
Kubatsira kwemuchina:
Km = 1.55/1 = 3l/1 = 3
Maitiro makuru:
Km = w / F
F = w / Km
F = 900 Newtons / 3
F = 300 Newton
Mhinduro chaiyo ndiA.
12. Tarisa mufananidzo wemuchina wekubata bhora uri pazasi!
Mutoro wacho unozofambiswa pedyo nechikamu chepasi che10 cm. Kuti simba remuchina wekusimbisa rirambe riripo, simba rinofanira...
A. pamwe ne54 N
B. kubvisa 64 N
C. pamwe ne75 N
D. kubvisa 96 N
Kukurukurirana
Verenga ruoko rwesimba (Lk)
Zvinozivikanwa kuti:
Ruoko rwemutoro (Lb) = 25 cm
Kurema kwemutoro (w) = 480 Newton
Simba (F) = 160 N
Akabvunzwa: Ruoko rwesimba (Lk)
Mhinduro:
Kubatsira kwemuchina (Km):
Km = w / F = 480 Newtons / 160 N = 3
Ruoko rwesimba (Lk):
Km = Lk/Lb
3 = Ruka/25 cm
Ruka = (3)(25 cm)
Ruka = 75 cm
Verenga hukuru hwesimba (F)
Zvinozivikanwa kuti:
Ruoko rwemutoro (Lb) = 25 cm - 10 cm = 15 cm
Kurema kwemutoro (w) = 480 Newton
Ruoko rwesimba (Lk) = 75 cm
Akabvunzwa: Simba (F)
Mhinduro:
Kubatsira kwemuchina (Km):
Km = Lk/Lb
Km = 75 cm / 15 cm
Km = 5
Hukuru hwesimba (F):
Km = w / F
F = w / Km
F = 480 Newtons / 5
F = 96 Newton
Kuti lever ive munzvimbo yakaenzana, simba rinoderedzwa ne64 Newtons (160 N - 96 N).
Mhinduro chaiyo ndeiyi B.
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