Zvinyorwa Nezveminda Yekukwevera Simba
Simba regiravhiti ipfungwa huru mufizikisi inotibatsira kunzwisisa kuti zvinhu zvinodyidzana sei kuburikidza negiravhiti. Simba regiravhiti rimwe remasimba mana akakosha muchadenga, pamwe chete nemagetsi emagetsi, simba renyukireya rakasimba, uye simba renyukireya risina simba. Isimba rekukwezva rinoitika pakati pezvinhu zviviri zvine huremu. Chinyorwa chino chichaongorora mativi akasiyana-siyana esimba regiravhiti, kubva pahwaro hwaro hwedzidziso kusvika pakushandiswa kwaro.
Nhanganyaya kupfungwa yeGravity
Simba rinokwevera pasi ndiro simba rakapararira kupfuura mamwe ose muchadenga, uye chinhu chimwe nechimwe chine huremu chinokwevera chimwe chinhu chimwe nechimwe nehuremu. Pfungwa iyi yakatanga kufarirwa naSir Isaac Newton muzana remakore rechi17 neMutemo wake weHuremu Hwese. Newton akaronga kuti chero zvinhu zviviri zvinokweverana nesimba rinoenderana nehuremu hwazvo uye zvakaenzana nechikwere chedaro riri pakati pazvo.
Muenzaniso weMutemo waNewton weGravitation weUniversal ndewekuti:
\[ F = G \frac{m_1 m_2}{r^2} \]
Di mana:
– \( F \) isimba rinokwevera zvinhu pakati pezvinhu zviviri,
– \( G \) ndiyo simba regiravhiti risingaperi (\( 6.67430 \times 10^{-11} \, \text{m}^3 \text{kg}^{-1} \text{s}^{-2} \)),
– \( m_1 \) uye \( m_2 \) ndiwo mass ezvinhu zviviri,
– \( r \) idaro riri pakati penzvimbo dzine huremu hwezvinhu zviviri.
Munda Wesimba Rekukwevera Zvinhu
Munda wegiravhiti (gravitational field) zvinoreva nzvimbo yakatenderedza huremu apo simba regiravhiti rechinhu ichocho rinogona kukanganisa zvimwe zvinhu. Izvi zvinoreva kuti chinhu chega chega chine huremu chinogadzira munda wegiravhiti wakakomberedza icho chinogona kunzwiwa nezvimwe zvinhu zviri mukati memunda iwoyo.
Simba reMunda weGravitational
Simba remumunda wegiravhiti panzvimbo imwe rinoenderana nehuremu hwechinhu chiri kugadzira munda uye daro kubva pakati pehuremu hwechinhu chacho. Simba remumunda wegiravhiti \( g \) panzvimbo imwe rinogona kuverengwa uchishandisa equation:
\[ g = G \frac{M}{r^2} \]
Di mana:
– \( M \) huremu hwechinhu chinoumba simba regiravhiti,
– \( r \) idaro kubva pakati pehuremu hwechinhu kusvika panzvimbo iri kutaurwa nezvayo.
Simba remunda uyu imhasuru inowanikwa nechinhu chipi nechipi chiri mumunda iwoyo. Pamusoro pePasi, simba remumunda wegiravhiti \( g \) rinenge \( 9.81 \, \text{m/s}^2 \).
Mitsetse Yemumunda Wegiravhiti
Munda wegiravhiti unogona kumiririrwa uchishandisa mitsetse yemunda inotsanangura kutungamira nesimba rayo. Mitsetse iyi inogara ichinongedzera pakati pehuremu hwechinhu chiri kugadzira munda, uye kana iri pedyo, ndipo painosimbawo simba regiravhiti munzvimbo iyoyo.
Nheyo yeSuperposition
Simba regiravhiti rinotevedzera mutemo we superposition, uyo unoti kana paine nzvimbo dzinopfuura imwe chete dzesimba regiravhiti, munda wese panzvimbo imwe ndiyo vhekita yenzvimbo dzese dzegiravhiti panguva iyoyo. Mutemo uyu unokosha zvikuru mukuongorora nzvimbo dzakaomarara dzegiravhiti, dzakadai segiravhiti riri pamusoro peNyika rinokonzerwa nehuremu husina kufanana hweNyika, kana muchadenga umo masimba egiravhiti emapuraneti kana nyeredzi dzakawanda anodyidzana.
Simba reGravitational Maererano neGeneral Theory yeRelativity
Kunyangwe Newton akapa hwaro hwakasimba hwekunzwisisa simba rinokwevera pasi, dzidziso huru yesimba rinokwevera pasi yakataurwa naAlbert Einstein pakutanga kwezana remakore rechi20 yakapa mufananidzo wakakwana. Zvichienderana nesimba rinokwevera pasi, simba rinokwevera pasi harisi simba rinokwezva chete, asiwo kutenderera kwenzvimbo nenguva kunokonzerwa nehuremu nesimba.
Maequations aEinstein emumunda, ayo ari pakati pedzidziso huru yehukama, ndeaya:
\[ R_{\mu\nu} – \frac{1}{2} g_{\mu\nu} R + g_{\mu\nu} \Lambda = \frac{8 \pi G}{c^4} T_{\mu\nu} \]
Di mana:
– \( R_{\mu\nu} \) ndiyo tensor yeRicci,
– \( g_{\mu\nu} \) ndiyo metric tensor inotsanangura kutenderera kwespace-time,
– \( R \) iRicci scalar,
– \( \Lambda \) ndiyo nguva dzose ye cosmological,
– \( T_{\mu\nu} \) ndiyo tensor yesimba-inokonzera simba,
– \( c \) ndiko kumhanya kwechiedza.
Einstein akaratidza kuti zvinhu zvikuru zvinokonzera kutenderera kwenzvimbo nenguva, uye zvimwe zvinhu zvinonzwa mhedzisiro yegiravhiti nekuti zvinofamba pamwe chete ne geodesics mune iyi curved space-time.
Mashandisirwo eMunda weGravitational
Minda yesimba rinokwevera zvinhu pasi inoita basa rakakosha muzviitiko zvakasiyana-siyana zvechisikigo uye mashandisirwo ehunyanzvi.
Madenderedzwa ePasirose neSatellite
Imwe yenzira dzinonyanya kushandiswa pakukwevera pasi ndeyekunzwisisa nzira dzinotenderera pasi dzemapuraneti nemasatellite. Mitemo yaKepler yekufamba kwemapuraneti, yakatanga kugadzirwa naJohannes Kepler uye yakazotsanangurwa naNewton, inoratidza kuti mapuraneti anofamba sei mumatanho akatenderera zuva nekuda kwesimba rezuva rinokwevera pasi.
Masetiraiti akagadzirwa nevanhu anoshandisawo simba regiravhiti kuchengetedza mafambiro aro. Kuverenga nekungwarira simba regiravhiti rePasi kunotibvumira kuisa masetiraiti munzvimbo dzatinoda kuti tikwanise kutaurirana, kuona Nyika, kufamba, nezvimwe zvinangwa zvakawanda.
Teresikopu Yesimba Rinokwevera
Simba rekukwevera pasi rinogona kushandiswawo se "telescope" yechisikigo. Chiitiko chinozivikanwa segiravhiti rinokwevera pasi chinoitika kana chiedza chinobva kuchinhu chiri kure kwazvo, senge giravhiti kana supernova, chikakombamiswa nesimba rinokwevera pasi rechinhu chikuru, senge rimwe giravhiti kana buri dema, pakati pacho nemunhu ari paNyika. Simba rekukwevera pasi rinobvumira vanoongorora nyeredzi kuona zvinhu zvingave zviri kure zvakanyanya kana kuti zvisina kujeka zvekuti hazvigone kuonekwa neteresikopu dzemazuva ano.
Fizikisi yezvepasi
Kudzidza nezvemunda wepasi unobata zvinhu pasi penyika kwakakoshawo mu geophysics kuti tinzwisise chimiro uye maumbirwo emukati mepasi. Kusiyana kwemunda wepasi unobata zvinhu pasi penyika kunogona kuratidza ruzivo nezvekupararira kwehukuru mukati mepasi, zvakaita sekuvapo kwemakomo egungwa, zvicherwa, uye mabasa ekuputika kwemakomo.
Kufamba neSetilaiti
Sisitimu yeGlobal Positioning System (GPS) inoshandisawo simba regiravhiti. Masatellite eGPS anotenderera Nyika uye anopa ruzivo rwenzvimbo zvichienderana nenguva yekutumirwa uye kugamuchira masaini. Mhedzisiro yesimba regiravhiti reNyika pamasatellite aya inofanirwa kutariswa kuti ive nechokwadi chekuti nzvimbo yacho yakarurama.
Mhedziso
Simba regiravhiti ipfungwa huru mufizikisi nenyeredzi. Rinotibatsira kunzwisisa kuti zvinhu zvinobatana sei kuburikidza negiravhiti, kubva pazvinhu zvidiki zvakaita sevanhu kusvika kuzvivako zvikuru muchadenga zvakaita semagalaxies. Kunzwisisa simba regiravhiti kunotibvumira kutsanangura zvakasiyana-siyana zvechisikigo uye kugadzira matekinoroji epamusoro anoita basa rakakosha muhupenyu hwedu hwezuva nezuva. Kubva pamitemo yaNewton kusvika kudzidziso yaEinstein yehukama, kudzidza kwesimba regiravhiti kuri kuramba kuchifambira mberi, zvichipa nzwisiso itsva muchadenga chedu.
