Mibvunzo yemuenzaniso weCentripetal Force

Mienzaniso mina yeMibvunzo yeCentripetal Force

1. Chinhu chine huremu hwemagiramu mazana maviri chinosungirirwa patambo diki uye chobva chatenderedzwa chakati twasu ne kumhanya kwekona inoramba iri pa5 rad s^-1, sezviri mumufananidzo unotevera. Kana kureba kwetambo kuri l = 60 cm, saka hukuru hwesimba repakati rinoshanda pachinhu chacho...

A. 0,3 N

B. 0,6 N

C. 3 N

D. 6 N

E. 30 N

Kukurukurirana

Zvinozivikanwa kuti:

Huremu hwechinhu (m) = 200 magiramu = 200/1000 kg = 2/10 kg = 0,2 kg

Kumhanya kwekona (ω) = 5 radians/sekondi

Kureba kwetambo = radius (r) yenzira yakatenderera = 60 cm = 60/100 metres = 0,6 metres

Akabvunzwa: Hukuru hwesimba repakati rinoshanda pachinhu ndehwekuti….

Mhinduro:

Simba repakati (centripetal force) ndiro simba rinokonzeresa kuti chinhu chiite kumhanya kwepakati (centripetal acceleration). Fomura yesimba repakati (centripetal force) ndeiyi:

∑F = ma_s

∑F = mv²/r = m ω² r

Information : ∑F = simba repakati, m = huremu hwechinhu, v = kumhanya kwetangential, ω = kumhanya kwekona, r = nharaunda yenzira yakatenderera.

∑F = m ω² r = (0,2)(5)² (0,6) = (0,2)(25)(0,6) = 3 Newtons

Mhinduro chaiyo ndiC.

2. Mudzidzi anotenderedza dombo rakasungirirwa kumagumo kwetambo. Dombo rinotenderedzwa rakatwasuka sezvakaratidzwa pamusoro apa. Kana kumhanya kwekutenderera kwedombo kukapetwa kaviri, simba repakati rinova...

A. Yepakutanga ka6

B. yepakutanga kashanu

C. Yepakutanga ka4

D. Kaviri zvakare

E. Yepakutanga kaviri

Kukurukurirana

Zvinozivikanwa kuti:

Huremu hwedombo = m

Kumhanya kwedombo = v

Kureba kwetambo = radius = r

Akabvunzwa: Kana kumhanya kwacho kwakapetwa kaviri, simba repakati rinova…

Mhinduro:

Kana kumhanya kwacho kwakapetwa kaviri, simba repakati rinova:

Simba repakati rinova rakapetwa ka4 kupfuura rekutanga.

Mhinduro chaiyo ndiC.

3. Mugwagwa wakatsetseka wakagadzirirwa kuti mota ifambe nekumhanya kwakanyanya kwe10 m/s.^-1Zvinozivikanwa kuti coefficient yekukweshana pakati petayi nemugwagwa i0,5 uye radius yekukombama kwemugwagwa iR m. Ipapo kukosha kweR ndi…. (g = 10 ms^-2)

A. 7,5 mamita

B. 8,0 mamita

C. 10 mamita

D. 15 mamita

E. 20 mamita

Kukurukurirana

Zvinozivikanwa kuti:

Kumhanya (v) = 10 m/s

Kukwana kwekukakavadzana pakati petai nemugwagwa (μ_s= = 0,5

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²

Akabvunzwa: Nharaunda yekukombama kwemugwagwa (R metres)

Mhinduro:

Simba rega rinobuda mugwara rakatwasuka rinoshanda pamotokari kana mota yatendeuka nderekuti simba rekukweshana rinogara riripoFomura yesimba rekukweshana kwakasimba:

4. Mota iri kufamba yakakombama mumugwagwa panzvimbo M sezvakaratidzwa mumufananidzo uri pazasi.

Kukwikwidzana kwe static pakati pevhiri nemugwagwa i 0,4 (gravitational acceleration 10 ms).^-2). Kuti mota isabude mugwara, kumhanya kwakanyanya kunobvumirwa ndekwekuti…

A. √10 ms^-1

B. 2√10 ms^-1

C. 4√10 ms^-1

D. 5√10 ms^-1

E. 6√10 ms^-1

Kukurukurirana

Zvinozivikanwa kuti:

Kukosha kwekukweshana kwakasimba (μ)_s= = 0,4

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²

Nharaunda yekukombama (R) = mamita makumi mana

Akabvunzwa: kumhanya kwakanyanya (v)

Mhinduro:

Fomura Mutemo wechipiri waNewton pada kufamba kwakafanana kwedenderedzwa

Information :

ΣF = simba repakati = simba rinobuda = simba rose, m = huremu hwechinhu, a_s = kukurumidza kwepakati, v = kumhanya kwakatwasuka, R = nharaunda yekukombama

Simba repakati

Simba repakati nepakati (centripetal force) ndiro simba rinobuda richinanga pakati penzira yakatenderera. Kana mota ichifamba yakatenderera, simba chete rinonanga pakati isimba repakati nepakati, saka simba repakati nepakati isimba repakati nepakati.

Fomura yesimba rekukweshana rinomira:

Information :

μ_s = coefficient yekukweshana kwakamira, w = huremu hwechinhu, m = huremu hwechinhu, g = kukurumidza nekuda kwegiravhiti.

Verenga kumhanya kwakanyanya (v):

Mhinduro chaiyo ndiC.

Kwakabva mubvunzo:

Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa