Mienzaniso 7 yekufamba kwedenderedzwa kunochinja zvakafanana
1. Propeller inotanga yakamira, inotenderera nekumhanya kwe angled kwe 2 rad/s.2. Tsvaga kumhanyisa kwekona uye kumhanya kwekona kwepropeller mushure memasekonzi maviri. Zviratidze nemaradians nemasekonzi.
Kukurukurirana
Zvinozivikanwa :
Akabvunzwa : kumhanyisa kwekona uye kumhanya kwekona mushure memasekonzi maviri
Jawab :
(A) Kukurumidza kweAngular mushure memasekonzi maviri
Kukurumidza kwekona kunoramba kuripo saka mushure memasekonzi maviri, kukurumidza kwekona kunoramba kuri 2 rad/s2.
(B) Kumhanya kwekona mushure memasekonzi maviri
Kukurumidza kwekona 2 rad/s2 = 2 radians/sekondi pasekondi zvinoreva kuti angular velocity inowedzera ne2 radians/sekondi pasekondi imwe chete. Mushure mesekondi imwe chete, angular velocity inova 2 radians/sekondi. Mushure memasekondi maviri, angular velocity inova 4 radians/sekondi.
2. Vhiri rinotanga ramira rinomhanyisa zvakafanana. Mushure memasekonzi gumi, vhiri rinotenderera nekumhanya kwe60 rpm. Sarudza kumhanyisa kwevhiri!
Kukurukurirana
Jawab :
Fomura yekufamba kwedenderedzwa kwakakasira (GMBB) yakafanana nefomura yekufamba kwedenderedzwa kwakakasira (GLBB).
Kukurumidza kwevhiri kwekona ndeye 0,628 rad/s 2
3. Kumhanya kwekona kwesirinda kunoshanduka zvakafanana kubva pa20 rad/s kusvika pa10 rad/s mumasekonzi mana. Tsvaga kumhanyisa kona kwesirinda!
Kukurukurirana
Jawab :
Kukurumidza kwe silinda kwekona ndeye -2,5 rad/s2Chiratidzo chekusashanda zvakanaka = kukurumidza kana kudzikira kwesimba. Kana mukumhanya, kumhanya kwekona kuchiwedzera, saka mukumhanya, kumhanya kwekona kunoderera.
4. Chinhu chinotanga kutenderera nekumhanya kwe angle kwe 10 rad/s chinowana kumhanyisa kwe angle kwe 2 rad/s nguva dzose.2Sarudza kona yakakomberedza chinhu mushure memasekonzi maviri!
Kukurukurirana
5. Vhiri remotokari rinotanga kutenderera nekumhanya kwe angle ye 20 rad/s rinomira kutenderera mushure mekufamba ne angle ye 20 radians. Kumhanya kwe angle yevhiri ndiko…
Kukurukurirana
Jawab :
Mubvunzo uyu unogadziriswa uchishandisa fomura 3.
6. Mibvunzo yebvunzo dzenyika dze1999/2000 P4 Nhamba 26
Chimuti chePQ chakareba masendimita makumi matanhatu (60 cm) chinotenderedzwa netip Q se axis uye PQ se radius yekutenderera. Chimuti chePQ chinotenderera kubva pakuzorora ne angular acceleration ye 0,3 rad s -2 . Kana nzvimbo yekutanga ye angular = 0, saka linear velocity (v) yetip P pa t = 10 seconds iri...
A. 1,8 ms -1
B. 3 ms -1
C. 5 ms -1
D. 30 ms -1
E. 180 ms -1
Kukurukurirana
Zvinozivikanwa kuti:
Kureba kwetsvimbo PQ = radius yedenderedzwa (r) = 60 cm = 60/100 m = 0,60 metres
Kumhanya kwekutanga kwekona (ω o ) = 0 rad/s
Kukurumidza kwekona (α) = 0,3 rad s -2
Nzvimbo yekutanga yekona (θ o ) = 0
Mubvunzo: Kumhanya kwemutsetse (v) kwekuguma P panguva t = masekondi gumi
Mhinduro:
Kutanga verenga kumhanya kwekona kwetsvimbo panguva t masekondi gumi.
Fomura yeKufamba Kwedenderedzwa Kwakakurumidziswa Zvakafanana:
ω t = ω o + α t = 0 rad/s + (0,3 rad s -2 )(10 sec) = 3 rad s -1
Kumhanya kwekona pa t = masekondi gumi i3 radians/sekondi.
Mwero wekufamba kwemutsara pa t = masekondi gumi unoverengerwa uchishandisa fomura yehukama huripo pakati pemwero wekufamba (v), mwero wekona (ω) uye radius (r).
v = r ω = (0,6 metres)(3 radians/sekondi) = 1,8 metres/sekondi.
Mhinduro chaiyo ndiA.
7. Mibvunzo yebvunzo yenyika ya2002/2003
Chinhu chinofamba mudenderedzwa chine kumhanya kwekutanga kwe4 rad/s uye chinoona kumhanyisa kwekona kwe0,5 rad/s 2 , ipapo kumhanya kwechinhu musekondi yechina ndiko...
A. 4,0 rad/s
B. 4,5 rad/s
C. 5,0 rad/s
D. 6,0 rad/s
E. 8,0 rad/s
Kukurukurirana
Zvinozivikanwa kuti:
Kumhanya kwekutanga kwekona (ω o ) = 4 radians/sekondi
Kukurumidza kwekona (α) = 0,5 rad/s 2
Nguva yepakati (t) = masekondi maviri
Mubvunzo: Kumhanya kwechinhu musekondi yechina (ω t )
Mhinduro:
Fomura yekuchinja kwakafanana kwekufamba kwedenderedzwa:
ω t = ω o + α t
ω t = 4 + (0,5)(4)
ω t = 4 + 2
ω t = 6 radians/sekondi
Mhinduro chaiyo ndiD.
