Ukuhlolwa kokusheshisa kwamandla adonsela phansi

Imiyalelo yokuhlolwa kokusheshisa amandla adonsela phansi

Inhloso yokuhlolwa :

– Abafundi bangathola ubukhulu bokusheshisa kwamandla adonsela phansi ngokusekelwe emiphumeleni yokuhlolwa.

Amathuluzi nezinto zokwakha :

– Misa iwashi
– Amatshe amancane (ungasebenzisa ezinye izinto)
– Irula noma ithuluzi lokulinganisa ubude

Imfundiso eyisisekelo :

Ukusheshisa kwamandla adonsela phansi

Ukusheshisa okudonsela phansi ukusheshisa okubonwa yinto ewa ngokukhululeka isuka ekuphakameni okuthile iye ebusweni boMhlaba. Ngokusekelwe ekuhlolweni okwenziwe ososayensi befiziksi, ubukhulu bokusheshisa okudonsela phansi koMhlaba bungu-9,8 m/s²Leli yinani elimaphakathi. Ukusheshisa okubangelwa amandla adonsela phansi ezindaweni ezahlukene kungenzeka kungabi yi-9,8 m/s ngqo.²Ukuze kube lula ukubala imibuzo, ngezinye izikhathi inani lokusheshisa kwamandla adonsela phansi lingu-9,8 m/s² lokhu kuzungezwe ku-10 m/s². Isiqondiso sokusheshisa kwamandla adonsela phansi sibheke enkabeni yomhlaba noma siqonde ngqo ebusweni bomhlaba.

Ukunyakaza kokuwa kwamahhala kanye nobudlelwano bakho nokusheshisa kwamandla adonsela phansi

Ukuwa kwamahhala ukunyakaza kwento ewa isuka ekuphakameni okuthile ibheke ebusweni bomhlaba ngaphandle kwejubane lokuqala futhi into ihlangabezana nokusheshisa okuqhubekayo kwamandla adonsela phansi okungu-9,8 m/s.²Ukusheshisa kuyinani le-vector, ngakho-ke kunobukhulu kanye nesiqondiso. Ubukhulu bokusheshisa ngenxa yamandla adonsela phansi buyi-9,8 m/s² Lokhu kusho ukuthi ijubane lento likhuphuka ngo-9,8 m/s njalo ngomzuzwana. Ngemva kokuwa ngokukhululekile imizuzwana emi-2, ijubane lento likhuphuka lifike ku-19,6 m/s. Njalo njalo. Indlela yokusheshisa amandla adonsela phansi ibheke enkabeni yoMhlaba.

Ijubane lanoma iyiphi into ekuweni okukhululekile liyanda njalo, ngakho-ke ukuwa okukhululekile kuyisibonelo sokunyakaza okuqondile okusheshisiwe ngokulinganayo. Kunezindlela ezintathu ezithathwe zokunyakaza okuqondile okusheshisiwe okufanayo ezisetshenziswa ukubala ubuningi obuphathekayo obuhlobene nokunyakaza okuqondile okufanayo, njengebanga, ijubane lokuqala nelokugcina, isikhawu sesikhathi, kanye nokusheshisa. Izindlela ezintathu yilezi: v_t =v_o + ku-, s = v_o t + ½ ku²e_t² =v_o² + 2 njengoba, lapho u-v_t = isivinini sokugcina, v_o = ijubane lokuqala, a = ukusheshisa kwento, t = isikhawu sesikhathi, s = ibanga elihanjiwe, v_o = isivinini sokuqala.

Ukuwa kwamahhala kuyisibonelo sokunyakaza okuqondile okusheshisiwe ngokulinganayo, ngakho-ke ifomula esetshenziswa ekuweni kwamahhala iyafana nefomula yokunyakaza okuqondile okusheshisiwe okufanayo ngenhla, futhi ilungiswa ukuze ivumelane nesimo nezimo zokuwa kwamahhala. Amafomula amathathu angenhla, uma eguqulwa abe ifomula yokuwa kwamahhala, azoshintsha abe yi-v._t = gt, h = ½ gt²e_t² = 2 gh, lapho u-v_t = isivinini sokugcina, g = ukusheshisa kwamandla adonsela phansi, t = isikhawu sesikhathi, h = ukuphakama noma ibanga elihanjiwe ohlangothini oluqondile.
Kulolu vivinyo, ukusheshisa kwamandla adonsela phansi kubalwa kusetshenziswa enye yamafomula okunyakaza kokuwa kwamahhala, okungukuthi h = ½ gt²Amanye amafomula amabili awakwazi ukusetshenziswa ngoba kulolu vivinyo isivinini sokugcina (v_t) izinto azikwazi ukulinganiswa. Ukuze kubalwe ubukhulu bokusheshisa kwamandla adonsela phansi, ifomula ishintshwa ibe g = 2 amahora / t².

Izinyathelo zokuhlola :

1. Linganisa ukuphakama lapho into izowela khona ngokukhululeka, bese uyifaka etafuleni ledatha bese uhlaziya idatha, inombolo 1.
2. Lahla into bese ulinganisa isikhathi lapho into iwela khona ngokukhululeka, bese uyifaka etafuleni ledatha bese uhlaziya idatha, inombolo 1.
3. Bala ubukhulu bokusheshisa kwamandla adonsela phansi usebenzisa ifomula g = 2 h / t², bese ufaka imiphumela yokubala kuthebula ledatha kanye nokuhlaziywa kwedatha, inombolo 1.
4. Phinda izinyathelo 1 kuya ku-3, bese ufaka imiphumela kuthebula ledatha kanye nokuhlaziywa kwedatha, izinombolo 2 no-3.
5. Bala isilinganiso sokusheshisa kwamandla adonsela phansi. Uma ukuhlolwa kuphindaphindwa kathathu, kuzoba namanani amathathu okusheshisa kwamandla adonsela phansi. Hlanganisa amanani amathathu ndawonye bese uwahlukanisa ngamathathu. Bhala phansi imiphumela yakho etafuleni.

Ukuhlaziywa kwedatha kanye nedatha :

* Faka inqubo yokubala kulesi sigaba

Isiphethohhayi:

Yisho isiphetho sakho ngokusekelwe emiphumeleni yokuhlola oyitholile, ubhekisele ezinhlosweni zokuhlola kanye nesisekelo sethiyori. Imibuzo eqondisayo:
– Uthole ukusheshisa okungakanani kwamandla adonsela phansi ngokuhlola?
– Ingabe ubukhulu bokusheshisa ngenxa yamandla adonsela phansi bulingana noma busondele ku-9,8 m/s² ?
– Uma ubukhulu bokusheshisa kwamandla adonsela phansi okutholayo buhluke kakhulu ku-9,8 m/s², yiziphi izinto ezithonya lokho?