Muenzaniso wemibvunzo yesimba rekukakavadzana

Mienzaniso mitanhatu yeMibvunzo yeFrictional Force

1. Bhokisi rine huremu hwe1 kg rakamira panzvimbo yakatsetseka. Chiyero chekukweshana kwesimba i0,4 uye kukurumidza kunokonzerwa negiravhiti i10 m/s.²Sarudza (a) hukuru hwesimba rekukweshana rinomira (b) simba rekukweshana diki F kuitira kuti bhokisi ritange kufamba!
Kukurukurirana
Zvinozivikanwa :
Akabvunzwa :
(a) Hukuru hwesimba rekukweshana rinomira (b) Hukuru hwesimba rekukweshana diki (F)
Jawab :
(A) Hukuru hwesimba rekukweshana rinomira (f)_s)
(B) Simba shoma rekudhonza (F)
Kana chinhu chikadhonzwa nesimba F asi chinhu chichiri pakuzorora, ipapo static friction iri kushanda pachinhu. Kana chinhu chikadhonzwa nesimba F uye chinhu chacho chatove kufamba, ipapo kinetic friction iri kushanda pachinhu chacho. Static friction inodzivisa kufamba kwechinhu uye sezvakaratidzwa mumufananidzo, kutungamira kwestatic friction kwakatarisana nekutungamira kwe tensile force (F). Kana tensile force (F) ine hukuru hwakafanana ne static friction force, ipapo chinhu chinozofamba (chinhu chinoramba chiri pakuzorora). Chinhu chinotanga kufamba kana tensile force yakakura kupfuura static friction force.
Saka simba rekudhonza (F) shoma kuti bhokisi ritange kufamba i4 Newtons.

2. Bhokisi rine huremu hwe1 kg rinoiswa panzvimbo yakatsetseka rakatsetseka rinodhonzwa nesimba F nenzira yekuti bhokisi rifambe mumutsara wakatwasuka nekumhanya kwakafanana. Kana coefficient yekinetic friction iri 0,1. Sarudza hukuru hwesimba rekudhonza F! (g = 10 m/s)²)  
Kukurukurirana
Zvinozivikanwa :
Akabvunzwa : F
Jawab :
Bhiriko richifamba mumutsara wakatwasuka nekumhanya kunogara = bhiriko richifamba nekumhanya kunogara = bhiriko richifamba pasina kukurumidza. Mutemo wekutanga waNewton unoti kana simba rinobuda richishanda pachinhu = 0, chinhu chacho chinenge chakamira kana kuti chichifamba nekumhanya kunogara.
Bhiriko rinofamba nekumhanya kwakasimba, saka simba rinobuda rinoshanda pabhiriko = 0. Kuti simba rinobuda risvike pa = 0, pamusoro pesimba rinodhonza F kurudyi, panofanira kunge paine simba rine hukuru hwakafanana naF asi rakanangidzirwa kuruboshwe. Simba riri kutaurwa isimba rinopwanyika, simba rinopwanyika rinoshanda pabhiriko kana chinhu chichifamba. Masvomhu:
Nekuti chinhu chinofamba mumutsara wakatwasuka nemwero usingachinji, hukuru hwesimba rekudhonza F = f_s = 1 Newton

3. Bhokisi rine huremu hwe1 kg riri kutsvedza pasi nekumhanya kwakasimba padenderedzwa rakakombama. Tsvaga coefficient yekinetic friction… (g = 10 m/s)²)
Kukurukurirana

Mashoko ekuwedzera:
w = simba rinokwevera pasi, w_x = chikamu chegiravhiti chakaenzana nepamusoro pendege yakatsamira, w_y = chikamu chesimba regiravhiti rakanangana nendege yakakombama, N = simba rakajairika, f_k = simba rekukweshana kwekinetic.

Jawab :
Bhokisi rinotsvedza pasi nekumhanya kwakasimba, saka simba rinobuda = 0. Bhokisi rinofamba pamusoro pendege yakakombama, uko pamusoro pendege yakakombama pane simba w_x uye f_kMasimba maviri aya ane hukuru hwakafanana asi ane mativi akasiyana saka simba rinobuda = 0.

[Chirungu : Simba rekukakavadzana kwekusagadzikana uye kinetic - matambudziko nemhinduro]

4. Kana huremu hwechinhu chacho huri 4 kg, kona yekutsvedza i30^o uye kukurumidza kwegiravhiti kwe10 ms^-2 Chinhu chicharamba chichitsvedza. Kukosha kukuru kwe coefficient of friction pakati pechinhu ne plane yakatsamira nde…
Kukurukurirana
Zvinozivikanwa kuti:
m = 4 kg, g = 10 m/s²
Akabvunzwa: chiyero chepamusoro chekukweshana?
Mhinduro:
Chiyero chekukakavara kwesimbi chakakura kupfuura chiyero chekukakavara kwesimbi, saka zvinorehwa nechiyero chekukakavara kwesimbi ndicho chiyero chekukakavara kwesimbi chakakura.
Zvinhu hazvifambi zvakananga zvakananga:
Tsiva f_s muequation 1 na f_s muequation 2.
5. Kana chinhu chikaiswa panzvimbo isina kurongeka uye chobva chadhonzwa nesimba, simba rinopikisa rinonzi friction rinoitika. Hukuru hwesimba iri rekukweshana hunoenderana...
A. kuomarara kwenzvimbo yekukweshana
B. hukuru hwesimba rakajairika
C. kuomarara kwenzvimbo dzinokweshana uye hukuru hwesimba rakajairika
D. huremu hwechinhu chiri kudhonzwa
E. hukuru hwesimba rinokwezva chinhu
Kukurukurirana
Kukweshana kwesimba kunoshanda kana chinhu chiri kudhonzwa asi chisati chafamba. Kukweshana kwesimba kunoshanda kana chinhu chiri kufamba.
Kana chinhu chacho chiri padenga rakati sandara saka N = w = mg
Kana chinhu chacho chiri padivi rakarerekera ipapo N = w_y = w cos theta (ona muenzaniso wedambudziko 1)
Tsananguro: f_s = simba rekukweshana risingachinji, f_k = simba rekukweshana kwekinetic, N = simba rakajairika, w = simba rinokwesha = huremu hwechinhu, g = kukurumidza nekuda kwesimba rinokwesha.
Kana dambudziko racho richireva nzvimbo yakatsetseka isina kusimba, saka hukuru hwesimba rekukweshana hunoenderana nekukweshana kwenzvimbo (friction coefficient) uye simba rakajairika (N).
Mhinduro chaiyo ndiC.

6. Hukuru hwesimba rekukweshana pachinhu chinofamba chakarerekera hunoenderana...
A. huremu hwechinhu uye kumhanya kwechinhu chacho
B. kona yekurerekera kwendege kuenda kune yakatwasuka uye kumhanya kwechinhu chacho
C. simba rakajairika uye kuomarara kwechinhu chacho
D. huremu hwechinhu uye kona yekurerekera kwendege kuenda kune yakatwasuka
E. kuomarara kwenzvimbo uye kumhanya kwechinhu chacho
Kukurukurirana
Fomura yesimba guru rekukweshana rinomira padenderedzwa rakanamira:
Mhinduro chaiyo ndiC.
Kunyange zvazvo coefficient yekukweshana inoenderana chete nekona yekutsvedza kuenda kune yakatwasuka (theta).