Nkhani za fizikisi zokhudza zochitika zachilengedwe ndi zina zotero zokhudzana ndi fizikisi.
Kuthamanga ndi kuchuluka kwa vekitala, kuchuluka kwenikweni komwe kuli ndi kukula ndi chitsogozo. Chizindikiro chake ndi ( kuthamanga ). Gawo lake lapadziko lonse lapansi ndi mamita pa sekondi imodzi , chidule m/s 2.
Kuthamanga kwapakati
Chitsanzo cha mavuto.
Galimoto yomwe poyamba imakhala yoyima kwa masekondi 5 kenako imayenda kummawa pa liwiro la 10 m/s. Dziwani kuchuluka kwa liwiro lomwe galimotoyo imathamanga.
Zokambirana
Ngati mutakankhira buku patebulo mpaka litasuntha, mukugwira ntchito pa bukulo. Chinthu chikagwa padziko lapansi chifukwa chakuti chakokedwa ndi mphamvu yokoka , mphamvu yokoka imagwira ntchito pa chinthucho. Mosiyana ndi zimenezi, ngati mutakankhira chinthu ndi mphamvu zanu zonse mpaka mutanyowa ndi thukuta koma chinthucho sichisuntha, simunagwire ntchito pa chinthucho. M'moyo watsiku ndi tsiku, amati mwagwira ntchito mwakhama kapena mwagwira ntchito molimbika kukankhira chinthu, koma malinga ndi sayansi, simunagwire ntchito pa chinthucho chifukwa chinthucho sichimasuntha (chinthucho sichisintha malo).
Zinthu Zofunika Kwambiri
Chinthu chomwe chimachita kuyenda molunjika ili ndi mphamvu yomwe ingawerengedwe pogwiritsa ntchito fomula iyi:
p = mv
Zambiri:
p = mphamvu (gawo lapadziko lonse lapansi ndi kilogalamu mita / yachiwiri, chidule kg m/s)
m = kulemera (gawo lapadziko lonse ndi kilogalamu, chidule cha kg)
v = liwiro (gawo lapadziko lonse lapansi ndi mita / sekondi, chidule m/s)
Kuchuluka kwa thupi mu kayendedwe kozungulira komwe kuli kofanana ndi kulemera (m) mu kayendedwe kowongoka ndi mphindi ya kutopa (I). Kuchuluka kwa thupi mu kayendedwe kozungulira komwe kuli kofanana ndi liwiro (v) mu kayendedwe kowongoka ndi liwiro la angularMotero, chinthu chomwe chikuzungulira chimakhala ndi mphamvu yomwe ingawerengedwe pogwiritsa ntchito njira iyi:
Nthawi Yopanda Kuvutika Kwambiri
Pali zinthu ziwiri, chimodzi mwa izo chili ndi kulemera kochepa ndipo china chili ndi kulemera kwakukulu. Ndi chinthu chiti chomwe chili chosavuta kusuntha ngati chikakankhidwa ndi mphamvu yomweyo? Zoona zake zikusonyeza kuti zinthu zomwe zili ndi kulemera kochepa zimakhala zosavuta kusuntha kuposa zinthu zomwe zili ndi kulemera kwakukulu. Chifukwa chake kukula kwa kulemera kwa chinthucho kumatsimikiza kukula kwa kuthamanga kwa chinthucho ngati mphamvu ikugwiritsidwa ntchito. Ngati mukuyenda molunjika, kulemera kwa chinthucho kumatsimikiza ngati chinthucho chili chosavuta kapena chovuta kusuntha (kufulumizitsa) ndiye kuti mukuyenda kozungulira, mphindi ya kulephera kwa chinthucho imatsimikiza ngati chinthucho chili chosavuta kapena chovuta kusuntha.
Zinthu Zofunika pa Mphamvu (Torque)
Manja a Kalembedwe
Taganizirani chinthu chozungulira, monga chitseko. Chitseko chikatsegulidwa kapena kutsekedwa, chimazungulira. Cholumikizira chitseko ndi khoma chimagwira ntchito ngati mzere wozungulira.
Chithunzi cha chitseko chomwe chikuwoneka kuchokera pamwamba. Taganizirani chitsanzo pamene chitseko chimakankhidwa ndi mphamvu ziwiri, pomwe mphamvu zonse ziwiri zimakhala ndi kukula ndi njira yofanana; njira ya mphamvuyo ndi yolunjika ku chitseko.
Kale munaphunzira lamulo lachiwiri la Newton lomwe limafotokozedwa kudzera mu equation iyi:
Chiganizochi chikufotokoza ubale womwe ulipo pakati pa mphamvu yochokera, yomwe imadziwikanso kuti mphamvu yeniyeni, ndi kulemera ndi kufulumira. Mphamvu yochokerayo yomwe imagwira ntchito pa chinthu chokhala ndi kulemera imapangitsa chinthucho kufulumira.
Nthawi ino tipereka mtundu wina wa lamulo lachiwiri la Newton, lomwe limafotokoza ubale pakati pa mphamvu yochokerapo ndi kusintha kwa mphamvu.
Liwiro ndi kuchuluka kwa vekitala, pomwe liwiro ndi kuchuluka kwa scalar. Liwiro limakhala ndi kukula ndi malangizo, pomwe liwiro limakhala ndi kukula kokha. Gawo lapadziko lonse lapansi ndi mamita pa sekondi, chidule m/s kapena ms -1 . Chizindikiro chake ndi v ( velocity ).
Liwiro lapakati ndi liwiro lapakati
Komanso phunzirani zitsanzo za liwiro la tangential ndi liwiro la angular.
Ngati chinthu chizungulira mozungulira wotchi ndikumaliza kuzungulira kamodzi (360o) mu sekondi imodzi, ndiye kuti liwiro la angular la magawo onse a fan ndi 1 rotation/second = 360 o /second = 6,28 radians/second ndipo malangizo a angular velocity ndi otchinga. Ngati radius ya fan ndi 20 cm, m'mphepete mwa fan mumayenda mozungulira ndi liwiro la (2)(3,14)(20 cm) / sekondi imodzi = 125,6 cm/s = 1,256 m/s. Mfundo 1 cm (0,01 m) kuchokera ku axis imayenda mozungulira ndi liwiro la (2)(3,14)(1 cm) / sekondi imodzi = 6,28 cm/s = 0,0628 m/s. R yaying'ono, liwiro limakhala laling'ono. Mu kuyenda kozungulira , liwiro nthawi zambiri limatchedwa tangential speed. Limatchedwa tangential chifukwa malangizo a liwiro nthawi zonse amakhala tangential ku njira yozungulira.
Kumvetsetsa Mtunda
Mtunda ndi kutalika kwa njira yomwe chinthu chinayenda. Mtunda ndi kuchuluka kwa scalar, kuchuluka kwenikweni komwe kuli ndi kukula kokha komanso kopanda kolowera. Gawo lapadziko lonse la mtunda ndi mita, chidule cha m. Chizindikiro cha mtunda ndi s.
Tanthauzo la Kusamutsidwa
Kusamuka ndi kusintha kwa malo a chinthu. Kusamuka ndi kuchuluka kwa vekitala, kuchuluka kwa thupi komwe kuli ndi kukula ndi njira. Njira yosamuka ingafotokozedwe ngati njira yolunjika (kumpoto, kum'mawa, kum'mwera, kumadzulo, ndi zina zotero) kapena pogwiritsa ntchito mawu akuti kumanzere, kumanja, mmwamba, kapena pansi.
Lamulo losunga mphamvu ya angular anati ngati mphindi ya mphamvu yochokerapo Mu chinthu cholimba chomwe chikuzungulira mtengo wake ndi zero ndiye mphamvu ya angular Chinthu cholimba chomwe chimayenda mozungulira nthawi zonse. Njira ya lamulo losunga mphamvu ya angular ingapezeke mwa masamu mwa kusintha njira ya lamulo lachiwiri la Newton la kuyenda kwa mphamvu ya angular.
