Speed Freefall

Kuyaziwa ukuthi Umhlaba edonsela yimuphi umzimba ukuze enkabeni yalo yi okuthiwa ensimini okudonsa izinto. Lokhu kusho ukuthi mkhulu ibanga phakathi umzimba kanye ebusweni iplanethi yethu, aba maningi amandla Zomhlaba kuyamthinta, futhi kulapho liphinyiselwe amandla adonsela phansi.

On umzimba falling thwi phansi, it namanje ehlaselwe amandla okukhulunywe ngawo ngaphambili, ngenxa isenzo lapho umzimba nakanjani awe phansi. It uhlala umbuzo evulekile njengoba lokho kuyoba ijubane layo uma igijima ekwindla? Ngakolunye uhlangothi, ngesihloko esithi, inomthelela ukumelana emoyeni, okuyinto anele, nezinye - namandla emzimbeni okhangwa Umhlaba ube ncono kunaloko longiko ezikude ke. Eyokuqala - ngeke ngokusobala isithiyo, nokwehlisa isivinini yesibili - ukunikeza ukusheshisa nesivinini ukwanda. Ngakho, kukhona abanye bengabaza ukuthi zinjalo yini kungenzeka ukukhulula kuwa on Earth? Empeleni, i- ukuwa komzimba kungenzeka kuphela a cleaner, lapho kungekho khona ukuphazamiseka ngesimo komoya ukumelana. Nokho, phakathi kohlaka physics zanamuhla, ukuwa mahhala umzimba ubhekwa ukunyakaza mpo, ongahlangani umsindo (emoyeni ukumelana kungenziwa dengwane Kulokhu).

Into wukuthi ukudala izimo lapho into falling alithintwa ngamanye amabutho, ngokukhethekile, emoyeni ofanayo, singakwazi eyayenziwe kuphela. Kuye Ucwaningo wafakazela ukuthi Isivinini ngokuwa khulula yomzimba a cleaner uhlale inombolo efanayo kungakhathaliseki isisindo somzimba. Lokhu ukunyakaza elibizwa nombala ngesivinini esikhulu. Waqale esachazwa physics esidumile sezinkanyezi uGalileo Galilei ezingaphezu kuka 4 emakhulwini eminyaka adlule. Ukuhlobana le miphumela akalilahlile amandla lawo kuze kube namuhla.

Njengoba sekushiwo, ukuwa khulula sehlangano kohlaka ekuphileni kwansuku zonke - ke kunemibandela, futhi akuyona igama ngempela lesifanele. Phezu Isivinini ukuwa sehlangano akuyona iyunifomu. Umzimba yanda, lapho ezinyakazayo ezifana uchazwa ngokuthi ibe yintfo lekhetsekile ezinyakazayo nombala ngesivinini esikhulu. Ngamanye amazwi, isivinini umzimba njalo ngomzuzu ngamunye ngeke ifane. Ukukhumbula lokhu kubhuka, singathola Isivinini yokuwa khulula zomzimba. Uma asiyeki isihloko ukushesha (ie, ungawulahli, kodwa umane ivinjelwe kusuka ukuphakama), velocity yayo sokuqala zero: Vo = 0. Nge zonke ngejubane yesibili kuzokhulisa ngokulingana isikhathi langemva nesivinini: gt.

Kubalulekile ukuphawula ngalolu g okokufaka onhlobonhlobo. Lokhu - ukusheshisa adonsela phansi. Ngaphambili, thina sekushiwo khona ukushesha lapho umzimba bewela ngaphansi kwezimo ezivamile, okungukuthi, ebukhoneni emoyeni futhi ngaphansi kwethonya gravity. Noma yimuphi umzimba eliwela emhlabathini ne ukusheshisa elilingana 9.8 m / s2, kungakhathaliseki isisindo sayo.

Manje, ebhekisela ukubhuka, esiyithola ifomula ezokwenza ukubala ijubane ukuwa khulula zomzimba:

V = Vo + gt.

Okungukuthi, ukuze izinga sokuqala (uma we epha umzimba wakhe ngokuphonsa, push noma ezinye manipulations) unezela umkhiqizo adonsela phansi ukusheshisa ngenani imizuzwana it asithathe umzimba ukufinyelela kwamanzi. Uma Isivinini sokuqala zero ke ifomula kuba:

V = gt.

Lokho nje ukusheshisa gravity ngaleso sikhathi.

Ngokufanayo, ukwazi ijubane khulula into falling, kungenzeka baphethe isikhathi ukunyakaza noma Isivinini kokuqala.

Kufanele futhi kube ifomula ovelele ukubala ijubane isidumbu siphoselwe engela enezingqimba, njengoba kulokhu kuzosebenza ngempoqo, kancane kancane ingasheshi ukuthi lingakanani ijubane lokuya aphonswe into.

Endabeni kubhekwe yithi, umzimba enza kuphela amandla adonsela phansi futhi emoyeni ukumelana ukuthi, ngokwengxenye enkulu, akuphazamisi ijubane ushintsho.