Insimu yamandla adonsela phansi - izinkinga nezixazululo

Insimu yamandla adonsela phansi - izinkinga nezixazululo

1. Iyini isilinganiso sensimu yamandla adonsela phansi yento A kanye nento B?

Kwaziwa:

Isisindo sento A (m _A ) = 1

Isisindo sento B (m _B ) = 2

Ibanga lento u-A ukusuka kwiplanethi yoMhlaba (r _A ) = 1

Ibanga lento engu-B ukusuka kuplanethi yoMhlaba (r _B ) = 2

Okufunwayo: Isilinganiso sensimu yamandla adonsela phansi yento u-A kanye nento u-B

Isixazululo:

Isibalo sensimu yamandla adonsela phansi yoMhlaba:

g = ubukhulu bensimu yamandla adonsela phansi, G = ukungaguquguquki kwamandla adonsela phansi, m _B = isisindo soMhlaba, r _B = irediyasi yoMhlaba

Isilinganiso sensimu yamandla adonsela phansi:

g _A : g _B

G: G/2

1 : 1/2

2: 1

2. Uma indawo yento u-A ingu-0.5R ngaphezu kobuso boMhlaba, kuyilapho indawo yento u-B ingu-2R ngaphezu kobuso boMhlaba, pho-ke iyini isilinganiso sensimu yamandla adonsela phansi esitholwe yinto u-A kanye nento u-B. U-R uyirediyasi yoMhlaba.

Kwaziwa:

Ibanga lento u-A ukusuka enkabeni yoMhlaba = 0.5R + R = 1.5R = 1.5

Ibanga lento engu-B ukusuka enkabeni yoMhlaba = 2R + R = 3R = 3

Okufunwayo: Isilinganiso sensimu yamandla adonsela phansi

Isixazululo:

Insimu yamandla adonsela phansi etholwa yinto A (g _A ):

Insimu yamandla adonsela phansi ebonwa yinto B (g _B ):

Isilinganiso sensimu yamandla adonsela phansi ebonwa yinto A kanye nento B:

3. Insimu yamandla adonsela phansi ebusweni boMhlaba ingu-g, bese kuthiwani insimu yamandla adonsela phansi ekuphakameni okungu-1.5R ngaphezu kobuso boMhlaba. R = irediyasi yoMhlaba.

Isixazululo

Amandla adonsela phansi (F) alingana ngqo nensimu yamandla adonsela phansi (g). Uma amandla adonsela phansi emakhulu, kulapho insimu yamandla adonsela phansi iba nkulu khona.

Amandla adonsela phansi (F) alingana ngqo no-1/r ² , lapho u-r = ibanga lento ukusuka enkabeni yomhlaba. Amandla adonsela phansi alingana ngqo no-1/r ² ukuze insimu yamandla adonsela phansi (g) nayo ilingane no-1/r ².

Uma usomkhathi esebusweni boMhlaba okungu-R (R = irediyasi yomhlaba) ukusuka enkabeni yomhlaba, insimu yamandla adonsela phansi ingu-g. Lokhu kungafakazelwa ngokusebenzisa izibalo ezilandelayo:

Insimu yamandla adonsela phansi (g) ilingana no-1 / R2 ^. Uma u-R = 1 khona-ke u-1 / R2 ⁼ 1/1 ² = 1/1 = 1. Uma ibanga losomkhathi lisuka enkabeni yomhlaba = 1 khona-ke usomkhathi uhlangabezana nensimu yamandla adonsela phansi ka = (g) (1) = g.

Ibanga losomkhathi ukusuka enkabeni yomhlaba lingu-1.5R = 1.5 (1) = 1.5 bese usomabhilidi edlula ensimini yamandla adonsela phansi engu-: 1 / R ² = 1 / 1.5 ² = 1 / 2.25. Ngakho-ke uma ibanga losomabhilidi lisuka enkabeni yomhlaba = 1.5 khona-ke usomabhilidi unensimu yamandla adonsela phansi engu- = (g) (1 / 2.25) = g / 2.25

4. Iyini isilinganiso sensimu yamandla adonsela phansi yomhlaba ezintweni ezimbili, enye ebusweni bomhlaba kanti enye ukuphakama okungu -½ R kusuka ebusweni bomhlaba (R = irediyasi yomhlaba)?

Kwaziwa:

Ibanga lento u-A ukusuka enkabeni yomhlaba (r _A ) = R = 1

Ibanga lento engu -B ukusuka enkabeni yomhlaba (r _B ) = 0.5R + R = 1.5R = 1.5

Okufunwayo: Isilinganiso sensimu yamandla adonsela phansi yomhlaba

Isixazululo:

Insimu yamandla adonsela phansi yomhlaba ebonwa yinto A (g _A ):

Insimu yamandla adonsela phansi yomhlaba ebonwa yinto A (g _B ):

Isilinganiso sensimu yamandla adonsela phansi yomhlaba esitholwa yinto A kanye nento B:

1. Iyini insimu yamandla adonsela phansi?
   • Impendulo: Insimu yamandla adonsela phansi imelela isikhala esizungeze isisindo lapho noma yisiphi esinye isisindo sizwa khona amandla ngenxa yamandla adonsela phansi. Kuyindlela yokuchaza ukuthi izinto zithintana kanjani ngokukhanga kwamandla adonsela phansi ngaphandle kokuthintana ngqo.
2. Amandla ensimu yamandla adonsela phansi ashintsha kanjani njengoba uqhubeka usuka kulokho okuwukhiqizayo?
   • Impendulo: Amandla ensimu yamandla adonsela phansi ayancipha ngesikwele sebanga ukusuka ku-mass yomthombo. Ngokukhethekile, kulandela umthetho wesikwele ophambene: uma uphinda kabili ibanga, amandla ensimu aba yingxenye yesine yamandla ayo okuqala.
3. Insimu yamandla adonsela phansi ihlobene kanjani namandla adonsela phansi?
   • Impendulo: Amandla ensimu yamandla adonsela phansi endaweni ethile emkhathini, amelwe yi $g$, ichazwa njengamandla adonsela phansi (F) ngeyunithi ngayinye isisindo (m) esitholwa yisisindo esincane sokuhlola esibekwe kuleyo ndawo. Ngokwezibalo, $g=F/m$.
4. Insimu yamandla adonsela phansi yoMhlaba ihluka kanjani ngokuphakama?
   • Impendulo: Njengoba ukuphakama kukhuphuka (njengoba uqhubeka usuka enkabeni yoMhlaba), amandla ensimu yamandla adonsela phansi ayancipha. Yingakho osomkhathi abaku-orbit bezwa amandla adonsela phansi amancane, yize besengaphansi kwethonya lamandla adonsela phansi oMhlaba.
5. Kusho ukuthini ukuthi amasimu adonsela phansi “amasimu okulondoloza”?
   • Impendulo: Insimu elondolozayo isho ukuthi umsebenzi owenziwa entweni ehamba phakathi kwamaphuzu amabili ensimini awuncikile endleleni ethathiwe. Kumasimu adonsela phansi, lokhu kusho ukuthi umsebenzi owenziwa ngamandla adonsela phansi entweni ehamba phakathi kwamaphuzu amabili uyafana kungakhathaliseki ukuthi uthatha yiphi indlela.
6. Amasimu adonsela phansi anezinqwaba eziningi ahlangana kanjani?
   • Impendulo: Izinkambu zamandla adonsela phansi ezivela ezinqwabeni eziningi zihlangana noma zihlanganiswe ngokwe-vector. Kunoma yiliphi iphuzu, insimu yamandla adonsela phansi ephumelayo iyisamba se-vector sezinkambu zamandla adonsela phansi ezikhiqizwa yisisindo ngasinye.
7. Ubunzima bento buyithinta kanjani insimu yamandla adonsela phansi eyikhiqizayo?
   • Impendulo: Insimu yamandla adonsela phansi ekhiqizwa yinto ilingana ngqo nobunzima bayo. Into enkulu kakhulu izokhiqiza insimu yamandla adonsela phansi enamandla kakhulu.
8. Amandla ensimu yamandla adonsela phansi alinganiswa kanjani?
   • Impendulo: Amandla ensimu yamandla adonsela phansi alinganiswa ngokwamandla ngesisindo seyunithi ngayinye. Kuhlelo lweyunithi ye-SI, alinganiswa ku $N/kg$ (Ama-Newton ngekhilogramu).
9. Ingabe amasimu adonsela phansi angasebenza? Uma kunjalo, kanjani?
   • Impendulo: Yebo, amasimu adonsela phansi angasebenza. Uma into ihamba iqonde ensimini yamandla adonsela phansi (njenge-apula eliwela eMhlabeni), insimu yamandla adonsela phansi iyasebenza entweni, futhi amandla adonsela phansi aleyo nto ayancipha.
10. Buyini ubudlelwano phakathi kwensimu yamandla adonsela phansi kanye namandla adonsela phansi?

• Impendulo: Amandla adonsela phansi ngamandla amandla into enawo ngenxa yesikhundla sayo ensimini yamandla adonsela phansi. Ushintsho emandleni adonsela phansi amandla ento luhlobene nomsebenzi owenziwa amandla adonsela phansi njengoba into ihamba. Insimu yamandla adonsela phansi ingatholakala ku-gradient (noma i-spatial derivative) yamandla adonsela phansi.