Fomura Yekukurumidza
Momentum ipfungwa huru mufizikisi inotsanangura kufamba kwechinhu uye kuti chinoshanda sei nenzvimbo yacho. Momentum inowanzotsanangurwa senzira yekuyera kuoma kwazvinoita kumisa chinhu chinofamba. Chinyorwa chino chichaongorora tsananguro yemomentum, fomura yekutanga yemomentum, musimboti wekuchengetedza momentum, uye mashandisirwo akasiyana-siyana epfungwa iyi muhupenyu hwezuva nezuva.
Kunzwisisa Kukurumidza
Momentum inhamba yevector inowanikwa kubva pachinhu chinobuda muhukuru hwacho uye kumhanya kwacho. Mukunyora kwemasvomhu, momentum (\( \mathbf{p} \)) inoratidzwa se:
\[ \mathbf{p} = m \mathbf{v} \]
Di mana:
– \( \mathbf{p} \) i momentum (kilogram metres pasekondi, kg·m/s),
– \( m \) huremu hwechinhu (kilogiramu, kg),
– \( \mathbf{v} \) ndiyo kumhanya kwechinhu (mita pasekondi, m/s).
Momentum ine gwara rakafanana nekumhanya kwechinhu. Chinhu chinofamba nekukurumidza kana chine huremu hwakawanda chichava nesimba guru.
Fomura Yekutanga Yekukurumidza
Kuti unzwisise zviri nani pfungwa ye momentum, zvakakosha kutarisa mimwe mienzaniso uye mashandisirwo e formula yekutanga ye momentum. Funga nezvezvinhu zviviri zviri kufamba nenzira imwechete kana yakapesana. Momentum yese ye system ye two-object ndiyo huwandu hwe momenta yega yega yechinhu chimwe nechimwe:
\[ \mathbf{p}_{\text{total}} = \mathbf{p}_1 + \mathbf{p}_2 \]
Apo \( \mathbf{p}_1 \) uye \( \mathbf{p}_2 \) pane momentum yechinhu chimwe nechimwe.
Nheyo Yokuchengetedza Simba
Nheyo yekuchengetedza simba rekufamba kwemhepo inoti kana pasina simba rekunze rinoita chimwe chinhu pahurongwa, simba rese rehurongwa rinoramba riripo. Izvi zvinoreva kuti muhurongwa hwakavharwa, simba risati rasvika chiitiko richafanana nesimba risati rasvika mushure mechiitiko ichocho. Pamasvomhu, nheyo iyi inotaurwa se:
\[ \mathbf{p}_{\text{before}} = \mathbf{p}_{\text{after}} \]
Nheyo yekuchengetedza simba rayo yakakosha zvikuru mukuongorora tsaona nekuputika.
Kurwisana Kwakapfava uye Kusina Kusimba
Mufizikisi, kugongana kunogona kupatsanurwa muzvikamu zviviri zvikuru: elastic uye inelastic.
1. Kubonderana kweElastic
Mukuputika kwe elastic, simba rese re kinetic re system isati yatanga uye yapera rinoramba riripo, kunze kwekuchengetedza simba re momentum. Muenzaniso wakapfava wekudonha kwe elastic mabhora maviri ebhiriyadhi anoroverana. Muchiitiko ichi:
\[ m_1 \mathbf{v}_1 + m_2 \mathbf{v}_2 = m_1 \mathbf{v}_1′ + m_2 \mathbf{v}_2′ \]
\[ \frac{1}{2} m_1 \mathbf{v}_1^2 + \frac{1}{2} m_2 \mathbf{v}_2^2 = \frac{1}{2} m_1 \mathbf{v}_1'^2 + \frac{1}{2} m_2 \mathbf{v}_2'
Apo \( \mathbf{v}_1 \) uye \( \mathbf{v}_2 \) dziri kumhanya kwezvinhu zvisati zvasangana, uye \( \mathbf{v}_1′ \) uye \( \mathbf{v}_2′ \) dziri kumhanya kwezvinhu mushure mekusangana.
2. Kubonderana Kusina Kusimba
Mukurwisana kusina kusimba, simba rese rekinetic harichengetedzwi, kunyange zvazvo simba rese rekinetic rinoramba rakachengetwa. Simba rinorasika rinowanzo shandurwa kuita chimwe chimiro, senge kupisa, ruzha, kana kushanduka kusingaperi. Kana paine kugongana kusina kusimba zvakakwana, zvinhu zviviri zvinogongana zvinofamba pamwe chete mushure mekugongana. Fomura ndeiyi:
\[ m_1 \mathbf{v}_1 + m_2 \mathbf{v}_2 = (m_1 + m_2) \mathbf{v}' \]
Apo \( \mathbf{v}' \) iri kumhanya kwakabatana kwezvinhu zviviri mushure mekubonderana.
Kushandiswa kweSimba muHupenyu hweZuva Nezuva
Pfungwa ye momentum haina kukosha mufizikisi yedzidziso chete, asiwo ine mashandisirwo akawanda anoshanda muhupenyu hwezuva nezuva uye tekinoroji yemazuva ano.
1. Mota dzeMotokari
Kufamba nesimba chinhu chakakosha mukugadzirwa nekushanda kwemotokari. Semuenzaniso, mutsaona yemotokari, musimboti wekuchengetedza kufamba nesimba unoshandiswa kuongorora simba rekukanda uye kukuvara kunozoitika. Masisitimu ekubhureka akagadzirwawo kuderedza kufamba kwemotokari zvakachengeteka uye zvinobudirira.
2. Kutakurwa kweRoketi
Mukuburitswa kwemaroketi, musimboti wekuchengetedza simba remaroketi unoshandiswa kutsanangura kuti maroketi anogona kufamba sei muchadenga. Kana roketi ikaburitsa magasi kumashure nekumhanya kukuru, simba remagasi anobuda rinoburitsa simba rinosundidzira roketi mberi.
3. Mitambo
Mitambo mizhinji inosanganisira pfungwa yekukurumidza. Semuenzaniso, mubhokisi, chibhakera chine simba chinoda musanganiswa wehukuru nekumhanya kweruoko. Munhabvu, kukanda kunobudirira kunoda kutamiswa kwekukurumidza kubva patsoka dzemutambi kuenda kubhora.
4. Nyanzvi yefizikisi yekuedza
Mukuyedza kwefizikisi, simba rinoshandiswa kudzidza hunhu hwezvikamu zvepasi. Muzvinhu zvinomhanyisa zvinhu, zvakaita seLarge Hadron Collider (LHC), zvikamu zvinokurumidziswa kusvika pakumhanya kwakanyanya zvisati zvasangana, zvichibvumira nyanzvi dzefizikisi kudzidza zvikamu zvinogadzirwa nekusangana.
Kufamba Kwemakona
Kuwedzera kune linear momentum, kunewo pfungwa ye angular momentum (\( \mathbf{L} \)), iyo inotsanangura kufamba kwechinhu. Angular momentum inotsanangurwa sechibereko che position vector (\( \mathbf{r} \)) uye linear momentum (\( \mathbf{p} \)):
\[ \mathbf{L} = \mathbf{r} \times \mathbf{p} \]
Di mana:
– \( \mathbf{L} \) ndiyo angular momentum (kilogram metres yakaenzana nemativi mana pasekondi, kg·m²/s),
– \( \mathbf{r} \) ndiyo vhekitori yenzvimbo kubva panzvimbo yekutenderera kusvika panzvimbo iyo simba rinoshanda (mita, m),
– \( \times \) ibasa rekuwedzera kuwanda.
Nheyo yekuchengetedza angular momentum inoshandawo, iyo inoti kana pasina torque yekunze inoshanda pane imwe system, angular momentum yese ye system icharamba yakadaro.
Mhedziso
Momentum ipfungwa huru mufizikisi inoyera kufamba kwechinhu uye kuti chinoshanda sei nenzvimbo yacho. Nzira yekutanga ye momentum, \( \mathbf{p} = m \mathbf{v} \), inotibvumira kuverenga momentum yechinhu zvichibva pahukuru hwacho uye kumhanya kwacho. Nheyo yekuchengetedza momentum, iyo inotaura kuti momentum yese yesystem inoramba yakagadzikana kana pasina masimba ekunze, chishandiso chakakosha mukuongorora kurovana nedzimwe nzira.
Pfungwa ye momentum ine mashandisirwo akawanda anoshanda muhupenyu hwezuva nezuva uye tekinoroji, kubva pakugadzira mota uye masisitimu ekubhureka, kusvika pakuburitswa kweroketi, kusvika pakuongorora mumitambo nekuyedza kwefizikisi. Kuwedzera kune linear momentum, angular momentum yakakoshawo pakutsanangura kufamba kwekutenderera. Kunzwisisa kwakadzama kwe momentum uye mashandisirwo ayo kunotibvumira kugadzira matekinoroji matsva uye kuwedzera kunzwisisa kwedu kwepasi rose.
