Simba repakati - matambudziko nemhinduro

Simba repakati - matambudziko nemhinduro

1. Bhora remagiramu mazana maviri, rakasungirirwa kumagumo kwetambo, rinotenderedzwa mudenderedzwa rakati twasu rine kumhanya kwemakona kwe5 rad s^-1Kana kureba kwetambo kuri 60 cm, chii chinonzi simba repakati?

Kikozvino:

Chinhu uremu (m) = 200 gr = 200/1000 kg = 2/10 kg = 0.2 kg

Kumhanya kwekona (ω) = 5 rad/s

Kureba kwetambo = radius (r) = 60 cm = 60/100 m = 0.6 m

Zvaidiwa: Simba repakati

Solution:

Simba repakati (centripetal force) ndiro simba rinokonzeresa kukurumidza kwepakati (centripetal force).

Kuenzanisa kwesimba repakati:

∑F = ma_s

∑F = mv²/r = m ω² r

∑F = Simba repakati, m = huremu hwechinhu, v = kumhanya kwakatwasuka, ω = angular velocity, r = radius.

∑F = m ω² r = (0.2)(5)² (0.6) = (0.2)(25)(0.6) = 3 N

2. Dombo rakasungirirwa pamucheto wetambo uye rakatenderedzwa nemudzidzi mudenderedzwa rakatwasuka. Kana kumhanya kwekupedzisira kwedombo = 2 x kumhanya kwekutanga, saka chii chinonzi simba repakati nepakati.

Zvinozivikanwa:

Huremu hwedombo = m

Kumhanya kweDombo = v

Kureba kwetambo = radius = r

Kuda: Simba repakati

Solution:

3. Mugwagwa wakakombama we radius R wakagadzirwa kuitira kuti mota ifambe nekumhanya kwe 10 ms^-1 inogona kutaurirana zvakachengeteka. Chiyero che kukweshana kwemamiriro ezvinhu pakati pemotokari nemugwagwa = 0.5. Chii chinonzi radius? Kuwedzera nekuda kwegiravhiti (g) = 10 ms^-2.

Zvinozivikanwa:

Kumhanya (v) = 10 m/s

Kukwana kwekukakavadzana kwemotokari nemugwagwa (μ)_s= = 0.5

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²

Kuda: nharaunda

Solution:

Simba rega riri munzira yakatwasuka isimba rekukweshana kwakasimba. Equation yekukweshana kwakasimba:

4. Chiyero chekukakavadzana kwevhiri nemugwagwa chinokwana 0.4. Kana kumhanyisa nekuda kwegiravhiti kuri 10 m/s², chii chinonyanya kumhanyisa mota kuti ikwanise kutendeuka isina kutsvedza kubva munzira yakakombama.

Zvinozivikanwa:

Kukweshana kwekusagadzikana (μ)_s= = 0.4

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²

Nharaunda yenzira (R) = mamita makumi mana

Kuda: kumhanya kwakanyanya (v)

Solution:

Kuenzanisa kwemutemo wechipiri waNewton mukufamba kwakatenderera kwakafanana:

ΣF = simba repakati = simba remagetsi, m = mmbongoro, mumwe_s = kukurumidza kwepakati, v = kumhanya kwakatwasuka, R = nharaunda yenzira

Simba repakati

Simba repakati (centripetal force) ndiro simba rinoburitsa kukurumidza kwepakati (centripetal acceleration). Muchiitiko ichi, simba repakati (centripetal force) ndiro simba rekukweshana kwepakati (static friction).

Kuenzanisa kwesimba rekukweshana kwesimba:

μ_s = chiyero chekukweshana kwakasimba, w = uremu, m = huremu, g = kukurumidza nekuda kwegiravhiti

Kumhanya kwakanyanya (v):

1. Chii chinonzi centripetal force?
   • Pindura: Simba repakati (centripetal force) isimba rinobata chinhu chinofamba munzira yakatenderera, rakanangana nepakati pedenderedzwa kana nzira. Ndiro rinoita kuti chinhu chirambe chiri mudenderedzwa racho.
2. Simba repakati nepakati rinosiyana sei nesimba repakati nepakati?
   • Pindura: Simba repakati (centrifugal force) isimba chairo rinoita basa pachinhu kuti chirambe chichifamba munzira yakatenderera. Simba repakati (centrifugal force), kune rumwe rutivi, isimba rinoonekwa rinoita serinosundira chinhu kubva pakati pedenderedzwa kana richionekwa kubva pachimiro chinotenderera. Simba repakati (centrifugal force) rinowanzonzi simba re "fungidziro" kana kuti "rekunyepedzera".
3. Chii chinoitika kana simba repakati pachinhu chinotenderera rikabva rabviswa kamwe kamwe?
   • Pindura: Kana simba repakati pechinhu chinotenderera rikangoerekana rabviswa, chinhu chacho chichafamba chakatwasuka munzira yakatenderera panzvimbo yakabviswa simba racho, zvichitevera mutemo wekutanga waNewton wekufamba.
4. Simba repakati rinodiwa rinoshanduka sei ne radius yenzira yakatenderera kuti rirambe richimhanya?
   • Pindura: Simba repakati rinodiwa rinoenderana neredhiyo yenzira yakatenderera. Kana kumhanya kwacho kukaramba kuripo asi redhiyo ikawedzera, simba repakati rinodiwa rinoderera, uye zvinopesana.
5. Simba repakati rinoshanduka sei kana kumhanya kwechinhu chiri kufamba denderedzwa kwakapetwa kaviri?
   • Pindura: Simba repakati rinoenderana zvakananga ne sikweya yekumhanya kwechinhu. Saka, kana kumhanya kwacho kukapetwa kaviri, simba repakati rinodiwa rinova rakakura zvakapetwa kana.
6. Ko simba rinokwevera pasi rinogona kushanda sesimba repakati here?
   • Pindura: Ehe, simba rinokwevera pasi rinogona kushanda sesimba repakati. Muenzaniso mukuru isimba rinokwevera pasi riri pakati peNyika neMwedzi, iro rinochengetedza Mwedzi uri munzira yawo uchitenderera Nyika.
7. Sei uchinzwa uchisundidzirwa parutivi kana uchitendeuka nemota?
   • Pindura: Kana mota ikatendeuka zvakapinza, simba repakati rinoita basa rakananga pakati penzira, richichengetedza mota iri munzira yayo yakatenderera. Zvisinei, muviri wako unowanzo ramba wakatwasuka nekuda kwekusaita zvakanaka. Kusundidzira uku kwekunze kwaunonzwa kunokonzerwa nesimba repakati uye kazhinji kunonzi "simba repakati."
8. Huremu hwechinhu hunokanganisa sei simba repakati rinodiwa kuti chifambe chakatenderera nekumhanya kwakafanana?
   • Pindura: Simba repakati rinodiwa rinoenderana zvakananga nehuremu hwechinhu chacho. Kana huremu hwechinhu hwakapetwa kaviri, simba repakati rinodiwa rinopetwawo kaviri, tichifunga kuti kumhanya uye radius zvinoramba zvakafanana.
9. Chii chinobatanidzwa nekukweshana kwesimba repakati pemotokari kana mota yatendeuka?
   • Pindura: Kana mota ikatendeuka, simba rekukweshana riri pakati pematairi nemugwagwa ndiro rinopa simba repakati kuti mota irambe iri munzira yakakombama. Dai pasina kukweshana (semuenzaniso, mumugwagwa une chando), mota yaizotadza kutendeuka uye yaizotsvedza ichienda kunze.
10. Ko kumanikidzwa kuri mutambo kunogona kushanda sesimba repakati here?

• Pindura: Ehe, kumanikidzwa kwetambo kana tambo kunogona kushanda sesimba repakati nepakati. Semuenzaniso, kana chinhu chikatenderedzwa munzira yakatenderera uchishandisa tambo, kumanikidzwa kwetambo kunopa simba repakati nepakati rinodiwa kuti chinhu chirambe chichifamba mudenderedzwa.