Uvavanyo lokukhawulezisa amandla adonsela phantsi komhlaba

Imiyalelo yovavanyo lokukhawulezisa amandla adonsela phantsi komhlaba

Injongo yovavanyo :

– Abafundi banokufumanisa ubukhulu bokukhawuleziswa kwamandla ombane ngokusekelwe kwiziphumo zovavanyo.

Izixhobo kunye nezinto :

– Misa iwotshi
– Amatye amancinci (ungasebenzisa ezinye izinto)
– Irula okanye isixhobo sokulinganisa ubude

Ithiyori esisiseko :

Ukukhawulezisa umxhuzulane

Ukukhawuleziswa kwamandla omhlaba kukukhawuleziswa okufunyanwa yinto ewa ngokukhululekileyo ukusuka kubude obuthile ukuya kumphezulu woMhlaba. Ngokusekelwe kuvavanyo olwenziwe ziingcali zefiziksi, ubukhulu bokukhawuleziswa kwamandla omhlaba yi-9,8 m/s.²Eli lixabiso eliphakathi. Ukukhawulezisa okubangelwa ngumxhuzulane kwiindawo ezahlukeneyo kusenokungabi yi-9,8 m/s ngqo.²Ukuze kube lula ukubala imibuzo, ngamanye amaxesha ixabiso lokukhawulezisa amandla omxhuzulane yi-9,8 m/s² oku kujikeleziswe kwi-10 m/s²Icala lokukhawulezisa amandla omxhuzulane lijonge embindini womhlaba okanye lithe nkqo kumphezulu womhlaba.

Intshukumo yokuwa ngokukhululekileyo kunye nolwalamano lwayo nokukhawuleziswa komxhuzulane

Ukuwa ngokukhululekileyo kukuhamba kwento ewa ukusuka kubude obuthile ukuya kumphezulu womhlaba ngaphandle kwesantya sokuqala kwaye into ifumana isantya esiqhubekayo somxhuzulane se-9,8 m/s.²Ukukhawulezisa yi-vector quantity, ngoko ke inobukhulu kunye necala. Ubukhulu bokukhawulezisa ngenxa yomxhuzulane yi-9,8 m/s² Oku kuthetha ukuba isantya sento sinyuka nge-9,8 m/s rhoqo ngomzuzwana. Emva kwemizuzwana emi-2 yokuwa ngokukhululekileyo, isantya sento sinyuka siye kwi-19,6 m/s. Njalo njalo. Indlela yokukhawulezisa amandla omxhuzulane isiya embindini woMhlaba.

Isantya sayo nayiphi na into ekuweni ngokukhululekileyo siyanda rhoqo, ngoko ke ukuwa ngokukhululekileyo ngumzekelo wentshukumo ethe tyaba ekhawulezileyo ngokulinganayo. Kukho iifomyula ezintathu ezifunyenweyo zentshukumo ethe tyaba ekhawulezileyo ngokulinganayo ezisetyenziselwa ukubala ubungakanani obuphathekayo obunxulumene nentshukumo ethe tyaba efanayo, njengomgama, isantya sokuqala nesokugqibela, ixesha eliphakathi, kunye nokukhawulezisa. Iifomyula ezintathu zezi: v_t =v_o + kwi, s = v_o t + ½ kwi²,v_t² =v_o² + 2 njenge, apho u-v_t = isantya sokugqibela, v_o = isantya sokuqala, a = ukukhawulezisa into, t = ixesha eliphakathi, s = umgama ohanjiweyo, v_o = isantya sokuqala.

Ukuwa okukhululekileyo ngumzekelo wentshukumo ethe tyaba ekhawulezileyo ngokulinganayo, ngoko ke ifomula esetyenzisiweyo kwi-free fall iyafana nefomula yentshukumo ethe tyaba ekhawulezileyo ngokulinganayo ngasentla, kodwa ihlengahlengiswa kwimeko kunye neemeko zokuwa okukhululekileyo. Iifomula ezintathu ezingasentla, ukuba ziguqulwe zibe yifomula yokuwa okukhululekileyo, ziya kutshintsha zibe yi-v._t = gt, h = ½ gt²,v_t² = 2 gh, apho u-v_t = isantya sokugqibela, g = ukukhawulezisa amandla omxhuzulane, t = ixesha eliphakathi, h = ukuphakama okanye umgama ohanjiweyo kwicala elithe nkqo.
Kolu vavanyo, ukukhawuleziswa kwamandla omxhuzulane kubalwa kusetyenziswa enye yeefomula zentshukumo yokuwa ngokukhululekileyo, ezizezi h = ½ gt²Ezinye iifomyula ezimbini azinakusetyenziswa kuba kolu vavanyo isantya sokugqibela (v_t) izinto azinakulinganiswa. Ukubala ubukhulu bokukhawuleziswa kwamandla omxhuzulane, ifomula itshintshwa ibe g = 2 iiyure / t².

Amanyathelo ovavanyo :

1. Linganisa ubude apho into iya kuwa khona ngokukhululekileyo, uze uyifake kwitheyibhile yedatha uze uhlalutye idatha, inombolo 1.
2. Yilahle into uze ulinganise ixesha eliphakathi ukuze into iwele ngokukhululekileyo, uze uyifake kwitheyibhile yedatha uze uhlalutye idatha, inombolo 1.
3. Bala ubungakanani bokukhawuleziswa komxhuzulane usebenzisa ifomula g = 2 h / t², uze ufake iziphumo zokubala kwitheyibhile yedatha kunye nohlalutyo lwedatha, inombolo 1.
4. Phinda amanyathelo ukusuka ku-1 ukuya ku-3, uze ufake iziphumo kwitheyibhile yedatha kunye nohlalutyo lwedatha, amanani 2 kunye no-3.
5. Bala umndilili wokukhawulezisa amandla adonsela phantsi. Ukuba uvavanyo luphindaphindwa kathathu, kuya kubakho amaxabiso amathathu okukhawulezisa amandla adonsela phantsi. Yongeza amaxabiso amathathu kunye uze wahlule kathathu. Bhala phantsi iziphumo zakho kwitheyibhile.

Uhlalutyo lwedatha kunye nedatha :

* Faka inkqubo yokubala kweli candelo

Isiphelon:

Xela isigqibo sakho ngokusekelwe kwiziphumo zovavanyo ozifumeneyo, ubhekisa kwiinjongo zovavanyo kunye nesiseko sethiyori. Imibuzo ekhokelayo:
– Ufumene ukukhawulezisa okungakanani kwamandla omxhuzulane ngolu vavanyo?
– Ingaba ubukhulu bokukhawulezisa ngenxa yomxhuzulane bulingana okanye busondele kwi-9,8 m/s² ?
– Ukuba ubukhulu bokukhawuleziswa kwamandla omxhuzulane okufumanayo bahluke kakhulu kwi-9,8 m/s², zeziphi izinto eziyichaphazelayo?