Nguva yekusaita basa

Nguva Yezvinhu Zvisina Kushanda

Kune zvinhu zviviri, chimwe chine huremu hudiki uye chimwe chine huremu hukuru. Ndechipi chinhu chiri nyore kufambisa kana chikasundidzirwa nesimba rimwe chete? Chokwadi chinoratidza kuti zvinhu zvine huremu hudiki zviri nyore kufambisa pane zvinhu zvine huremu hukuru. Saka saizi yehuremu hwechinhu ndiyo inosarudza saizi yekumhanya kwechinhu kana simba rikashanda. Kana mukufamba kwakatwasuka, huremu hwechinhu hunoratidza kana chinhu chiri nyore kana kuti chakaoma kufambisa (kukurumidzisa) saka mukufamba kwekutenderera, nguva yekusashanda kwechinhu ndiyo inosarudza kana chinhu chiri nyore kana chakaoma kufambisa.

zvimedu
Funga nezvechinhu chinotenderera. Chinhu chine huremu m chinopihwa simba F kuitira kuti chinhu chitenderere padenderedzwa rekutenderera O. Chinhu ichi chinhambwe r kubva padenderedzwa rekutenderera. Pakutanga chinhu ichi chinenge chakazorora (v = 0). Mushure mekufambiswa nesimba F, chinhu ichi chinotenderera nekumhanya kwakati kuti kuitira kuti chinhu chiwedzere kumhanya (tan).
Hukama huripo pakati pesimba (F), uremu (m), uye kukurumidza kwetangential (tan) yechinhu chimwe chete hunoratidzwa ne equation:
Chidimbu chinotenderera kuitira kuti chidimbu chive nekukurumidzisa kwe-angular. Hukama huripo pakati pekukurumidzisa kwe-tangential nekukurumidzisa kwe-angular hunoratidzwa ne equation:
Tsiva kana kutsiva tangential acceleration (tan) mu equation 3 ne tangential acceleration (tan) mu equation 4.
Wedzera mativi ekuruboshwe nerudyi ne r:
r F inguva yesimba uye mr.² ndiyo nguva yekusashanda kwechikamu I). Equation 5 inotaura hukama huripo pakati penguva yesimba, nguva yekusashanda uye kumhanyisa kwechikamu chinotenderera. Equation 5 ndiyo equation yechipiri yaNewton yechikamu chinotenderera.
I ichibereko chehukuru hwechinhu (m) uye sikweya yedaro rechinhu kubva pa axis yekutenderera (r).²).
Information :
I = nguva yekusashanda kwechikamu, m = huremu hwechikamu, r = chinhambwe pakati pechikamu ne axis yekutenderera
Equation 6 inoshandiswa kuona nguva yekusashanda kwechinhu chinotenderera.
Kuti munzwisise zviri nani ongororo maererano nenguva yekusagadzikana kwezvikamu, ndapota dzidza mienzaniso yezvinetso zveparticle moment of inertia.

Muviri wakasimba wakafanana
Muviri wakasimba unoumbwa nezvidimbu zvakawanda zvakapararira mumuviri wese. Nguva yemuviri wakasimba ndiyo huwandu hwenguva dzese dzezvikamu zvese zvinoumba muviri wakasimba.
Kuti uone I yechinhu chakasimba, chinhu chinoonekwa panguva yacho chiri kutenderera nekuti nzvimbo ye axis yekutenderera inokanganisa kukosha kwenguva yacho. Pamusoro pekunge zvichienderana nenzvimbo ye axis yekutenderera, I ye particle inoenderanawo nehuremu hwe particle (m) uye sikweya yedaro re particle kubva ku axis yekutenderera (r).²). Huremu hwezvinhu zvose zvinoumba chinhu hwakafanana nehuremu hwechinhu chacho pachacho. Dambudziko nderekuti, daro rechinhu chimwe nechimwe kubva pa axis yekutenderera rinosiyana.
Funga nezvekutorwa kwefomura yerin'i yakatetepa yeradius R uye uremu M. Kana axis of rotation iri pakati perin'i, saka zvidimbu zvese zvinoumba rin'i zviri kure ne axis of rotation. I yerin'i yakatetepa yakaenzana nehuwandu hwenguva dzezvidimbu zvese zvinoumba rin'i.
Chidimbu chimwe nechimwe chinoumba rin'i yakatetepa chiri kure ne r kubva ku axis yekutenderera kuitira kuti r₁ =r₂ =r₃ = r = R.
Fomura yemhete yakatetepa:
Ini = MR²
Information :
I = nguva yekusashanda kwemhete yakatetepa, M = huremu hwemhete yakatetepa, R = radius yemhete yakatetepa
Ko kana axis of rotation isiri pakati pering? Kana axis of rotation isiri pakati pering, fomura yering yakatetepa haigone kuwanikwa uchishandisa nzira iri pamusoro nekuti daro rechikamu chimwe nechimwe kubva paaxis of rotation rinosiyana.

Fomura yemuviri wakasimba wakaenzana
Aya ndiwo maforamu ezvimiro zvakawanda zvakasimba zvakafanana.

Muenzaniso wezvinetso

1. Mibvunzo yebvunzo dzenyika dzeSMA/MA dzegore ra2017

Teerera tafura inotevera!

Zvinhu P, Q, naR zvakabatana netsvimbo isina simba. Hukuru hwenguva yekusashanda kwehurongwa hunosvika axis yakatarisana nendege kuburikidza neaxis yechinhu P ndi…

Kukurukurirana

Zvinozivikanwa:

Akabvunzwa: Nguva yekusashanda zvakanaka kwehurongwa

Mhinduro:

Nguva yekusashanda kwechinhu Q:

I _Q = mr ² = (0,5)(10 ² ) = (0,5)(100) = 50 kg m ²

Nguva yekusashanda kwechinhu R:

I _R = mr ² = (3)(6 ² ) = (3)(36) = 108 kg m ²

Nguva yekusashanda kwechinhu P:

Mutsetse wekutenderera unopfuura nemumucheto wechinhu P kuitira kuti r = 0.

Nguva yekusashanda zvakanaka kwehurongwa:

I = 50 kg m ² + 108 kg m ²

I = 158 kg m ²