I- ukuwa kwamahhala nokuphonsa mpo bakha ukunyakaza okuma mpo kwamahhala okubonakala ngale ndlela ngokuba nobuchule bokulandela umkhondo owodwa kusuka phezulu kuya phansi (esimweni sokuwa mahhala) nangaphansi ngezansi (esimweni sokujula mpo). Babizwa bakhululekile ngenxa yokuthi abanawo amandla wokuphambana, okungukuthi, ngoba babhekwa ngendlela engaqondakali ukuthi benziwa endaweni engenalutho. Ubulula balezi zinhlangano ezimbili, ngenxa yokungabikho kwamandla okulwa, kubenza babe ngabokuqala ukujoyina ukufundwa kwesayensi yomzimba, okuvamile ezikoleni zamabanga aphakeme. Ekuzivocavoca umzimba okuhambisana nokuhamba lokhu okubili, isisindo noma isisindo akubandakanyeki, nokuthi ukungqubuzana akubhekwa kusho ukuthi ukuma kweselula okuvukayo noma okuwayo akunandaba.
Umnyombo we ukuwa kwamahhala nokuphonsa mpokungukuthi bangabesigaba somzimba sokunyakaza kwe-rectilinear, ngokuhlukahluka ngokufanayo. Lokhu kusho ukuthi, njengoba kushiwo, balandela indlela eyodwa, ezingayilandeli ngejubane elilodwa kepha ngejubane elilodwa: lokhu kushesha kubizwa amandla adonsela phansi, ubukhulu obusemhlabeni cishe amamitha ayi-9.8 ngomzuzwana, ngomzuzwana ngamunye.
( *) Ishiwo ngokwezibalo, ingu-9.8 M / S2, futhi kuchazwa kuze kufike ezingeni lokuthi kusukela endaweni yokuqala, elesibili ngalinye ijubane lizoba ngamamitha ayi-9.8 ngomzuzwana (isilinganiso sejubane) ngaphezulu.
Ngenkathi i- izakhiwo zomzimba zombili ukunyakaza ziyefana, ziyehluka kwezinye izici. Ngemuva kwalokho i- umehluko omkhulu phakathi kokuwa kwamahhala nokuphonsa mpo:
- Ngokuwa kwamahhala, umzimba uvunyelwe ukuwa ngokukhululeka ekuphumuleni ngaphandle kokuphonswa kunoma iyiphi indlela, ngakho-ke kubhekwa i-velocity yokuqala elingana no-0.
- Ekudutshulweni okumi mpo, ngakolunye uhlangothi, ukunyakaza kwenziwa kusuka phansi kuya phezulu ngejubane lokuqala, lapho kukhuphuka ukunyakaza kubambezeleka futhi ukusheshisa kubheke phansi, nejubane liye phezulu. Ijubane leselula liyama lize lifike ku-0 endaweni ephakeme kakhulu yohambo, lapho kuqala khona ukunyakaza kokuwa kwamahhala.
Uhlu olulandelayo luzofaka ezinye izibonelo zokuwa kwamahhala nabanye izibonelo zokudubula eziqondile, ukuzivocavoca nesisombululo sabo esihambisanayo esenza ukuqonda kwabo kube lula.
- Ibhola lehla esakhiweni, okuthatha imizuzwana engu-8 ukufika phansi. Lishaya ngejubane elingakanani ibhola phansi? Isixazululo: Intuthuko ngokusheshisa kwe-9.81 M / S.2 imizuzwana engu-8, okungukuthi, ishaya ngejubane lama-78 M / S.
- Emsebenzini owedlule, yini ukuphakama kwesakhiwo? Ukulungiswa: Ukuphakama kwesakhiwo kubalwa njengengxenye yokusheshisa, kuphindwe isikwele sesikhathi: kulokhu, kuzoba (½ * 9.81 M / S2) (* 8S)2. Ukuphakama kwesakhiwo kungamamitha angama-313.92.
- Into iwela ekuweni kwamahhala futhi ifinyelela ngejubane le-150 M / S. Kuthathe isikhathi esingakanani ukuwa? Ukulungiswa: Kuthatha cishe imizuzwana eyi-15.
- Uyini umfutho wokugcina wento ewa mahhala eqala ekuphumuleni iwele imizuzwana eyi-10? Isixazululo: 98.1 M / S.
- Kwenye iplanethi, iselula iphonswa futhi ithatha imizuzwana engama-20 ukufika phansi, lapho ifika khona ngejubane le-4 M / S. Kuyini ukushesha kwamandla adonsela phansi kuleyo planethi? Ukulungiswa: Ukusheshisa kukhona okungu-0.2 M / S2.
- I-projectile yethulwa iqonde phezulu phezulu nge-velocity yokuqala engama-25 M / S. Kuthatha isikhathi esingakanani ukufika endaweni yakho yejubane eliphezulu? Isixazululo: Ingxenye yama-25 M / S, futhi ilahlekelwa ngu-9.81 njalo ngomzuzwana. Ngakho-ke, kuzothatha imizuzwana engu-2.54 ukufika phansi.
- Ekuvivinyweni kwangaphambilini, yini ukuphakama okuhambelana nesivinini esiphezulu? Isixazululo: Ukuphakama kubalwa njengengxenye yesivinini sokuqala, siphindaphindwe ngesikhathi. Lapha u-12.5 M / S * 2.54 S = amamitha angama-31.85.
- Ibhola liphonswa phezulu ngejubane lokuqala lama-22 M / S. Yini amandla ayo ngemizuzwana emi-2? Isixazululo: 2.38 M / S.
- Kungasiphi isivinini sokuqala lapho umcibisholo kufanele udutshulwe ubheke phezulu phezulu ukufinyelela ubude bamamitha ayi-110 kumasekhondi angu-5.4? Isixazululo: Njengoba ilahleka ijubane, siqala kowamanqamu futhi umkhiqizo wesikhathi namandla adonsela phansi wengezwe: 110 M / S + 5.4 S * 9.81 M / S2 = 162.97 M / S.
- Kuthatha isikhathi esingakanani ukuthi iselula ephonswe phezulu nge-velocity yokuqala engama-200 M / S ize ime ngokuphelele? Isixazululo: Kuthatha imizuzwana engama-20.39.
