Ọgba aghara ike - nsogbu na ngwọta

Ọgba aghara ike - nsogbu na ngwọta

1. Kedu ihe bụ oke nke ubi ndọda nke ihe A na ihe B?

A maara:

Ibu nke ihe A (m _A ) = 1

Ibu nke ihe B (m _B ) = 2

Anya nke ihe A site na mbara ala Ụwa (r _A ) = 1

Anya nke ihe B site na mbara ala Ụwa (r _B ) = 2

Achọrọ: Oke nke ubi ndọda nke ihe A na ihe B

Ngwọta:

Usoro nke ubi ndọda nke Ụwa:

g = oke nke ubi ndọda, G = ihe ndọda na-agbanwe agbanwe, m _B = oke nke Ụwa, r _B = radius nke Ụwa

Oke nke ubi ndọda:

g _A : g _B

G: G/2

1: 1/2

2: 1

2. Ọ bụrụ na ọnọdụ nke ihe A dị 0.5R n'elu elu ụwa, ebe ọnọdụ nke ihe B dị 2R n'elu elu ụwa, kedu ka oke nke ubi ndọda nke ihe A na ihe B nwetara. R bụ radius nke Ụwa.

A maara:

Anya nke ihe A site na etiti ụwa = 0.5R + R = 1.5R = 1.5

Anya nke ihe B site na etiti ụwa = 2R + R = 3R = 3

Achọrọ: Oke nke ubi ndọda

Ngwọta:

Ọgba ike ndọda nke ihe A (g _A ) na-enweta:

Ọgba ike ndọda nke ihe B (g _B ) na-enweta:

Oke nke ubi ndọda nke ihe A na ihe B nwetara:

3. Ubi ndọda dị n'elu ụwa bụ g, kedu ihe bụ ubi ndọda dị n'elu 1.5R n'elu ụwa. R = radius nke Ụwa.

ngwọta

Ike ndọda (F) na-adabara kpọmkwem na ubi ndọda (g). Ka ike ndọda na-akawanye njọ, otú ahụ ka ubi ndọda na-akawanye njọ.

Ike ndọda (F) kwekọrọ kpọmkwem na 1/r ² , ebe r = anya nke ihe site na etiti ụwa. Ike ndọda kwekọrọ kpọmkwem na 1/r ² nke mere na ubi ndọda (g) kwekọrọkwa na 1/r ².

Mgbe onye na-aga mbara igwe nọ n'elu ụwa nke bụ R (R = radius nke ụwa) site na etiti ụwa, ubi ndọda bụ g. Enwere ike igosi nke a site na mgbakọ ndị a:

Ebe ndọda (g) hà nhata na 1 / R ^2. Ọ bụrụ na R = 1, mgbe ahụ 1 / R ² = 1/1 ² = 1/1 = 1. Ọ bụrụ na anya nke onye na-aga eluigwe site na etiti ụwa = 1, mgbe ahụ onye na-aga eluigwe na-ahụ ebe ndọda nke = (g) (1) = g.

Ogologo anya nke onye na-aga mbara igwe site n'etiti ụwa bụ 1.5R = 1.5 (1) = 1.5 mgbe ahụ onye na-aga mbara igwe ga-enweta oghere ndọda nke: 1 / R ² = 1 / 1.5 ² = 1 / 2.25. Ya mere, ọ bụrụ na anya nke onye na-aga mbara igwe site na etiti ụwa = 1.5 mgbe ahụ onye na-aga mbara igwe nwere oghere ndọda nke = (g) (1 / 2.25) = g / 2.25

4. Kedu ihe bụ oke nke ubi ndọda ụwa maka ihe abụọ, otu n'elu ụwa na nke ọzọ n'ịdị elu nke ½ R site na elu ụwa (R = radius nke ụwa)?

A maara:

Anya nke ihe A site na etiti ụwa (rA ₎ = R = 1

Anya nke ihe B site na etiti ụwa (r _B ) = 0.5R + R = 1.5R = 1.5

Achọrọ: Oke nke ubi ike ndọda ụwa

Ngwọta:

Ubi ike ndọda nke ihe A (gA ₎ nwetara:

Ubi ike ndọda nke ihe A (g _B ) nwetara:

Oke nke ubi ndọda ụwa nke ihe A na ihe B na-enweta :

1. Gịnị bụ ubi ndọda?
   • Azịza: Ubi ndọda na-anọchite anya oghere gbara oke ebe oke ọ bụla ọzọ na-enweta ike n'ihi oke ndọda. Ọ bụ ụzọ isi kọwaa otu ihe si emetụta ibe ha site na ndọda ndọda na-enweghị kọntaktị kpọmkwem.
2. Kedu ka ike nke ubi ndọda si agbanwe ka ị na-aga n'ihu site na oke nke na-emepụta ya?
   • Azịza: Ike nke ubi ndọda na-ebelata ka square nke anya si na isi mmalite dị. N'ụzọ doro anya, ọ na-agbaso iwu inverse-square: ọ bụrụ na ị jiri okpukpu abụọ nke anya ahụ, ike ubi ahụ na-aghọ otu ụzọ n'ụzọ anọ nke ike mbụ ya.
3. Kedu ka o si metụta ike ndọda na ike ndọda?
   • Azịza: Ike ike ndọda n'otu ebe n'ime mbara igwe, nke a na-anọchite anya ya $g$, a na-akọwa ya dị ka ike ndọda (F) kwa oke otu (m) nke obere oke nnwale e tinyere n'ebe ahụ na-enweta. N'ime mgbakọ na mwepụ, $g=F/m$.
4. Kedu ka ike ndọda nke Ụwa si agbanwe site n'ịdị elu?
   • Azịza: Ka elu na-arị elu (ka ị na-aga n'ihu site n'etiti ụwa), ike ike ndọda na-ebelata. Ọ bụ ya mere ndị na-aga mbara igwe na gburugburu ụwa ji enwe ike ike ndọda, ọ bụ ezie na ha ka nọ n'ime mmetụta ike ndọda nke ụwa.
5. Gịnị ka ọ pụtara ikwu na ubi ike ndọda bụ "ubi nchekwa"?
   • Azịza: Ubi nchekwa pụtara na ọrụ e mere n'ihe na-agagharị n'etiti isi ihe abụọ dị n'ọhịa ahụ na-adabereghị n'ụzọ e si aga. Maka ubi ndọda, nke a pụtara na ọrụ ike ndọda rụrụ n'ihe na-agagharị n'etiti isi ihe abụọ bụ otu ihe n'agbanyeghị ụzọ ọ na-aga.
6. Kedu otu ebe ike ndọda nke ọtụtụ oke si ejikọta?
   • Azịza: Ubi ndọda sitere na ọtụtụ oke na-anọchi anya ma ọ bụ na-ejikọta ya na vektọ. N'oge ọ bụla enyere, ubi ndọda sitere na ya bụ ngụkọta vektọ nke ubi ndọda nke oke ọ bụla mepụtara.
7. Kedu ka ibu nke ihe si emetụta ubi ndọda ọ na-emepụta?
   • Azịza: Ebe ndọda nke ihe mepụtara dabara kpọmkwem na oke ya. Ihe buru ibu karị ga-emepụta ebe ndọda siri ike karị.
8. Kedu otu esi atụ ike ike ndọda?
   • Azịza: A na-atụ ike ndọda site n'iji ike kwa otu oke. Na sistemụ SI, a na-atụ ya na $N/kg$ (Newton kwa kilogram).
9. Ọ bụrụ otu a, kedu ka o si arụ ọrụ?
   • Azịza: Ee, ubi ndọda nwere ike ịrụ ọrụ. Mgbe ihe na-aga n'akụkụ ubi ndọda (dị ka apụl na-ada n'ụwa), ubi ndọda na-arụ ọrụ na ihe ahụ, ike ndọda nke ihe ahụ na-ebelatakwa.
10. Kedu njikọ dị n'etiti ubi ndọda na ike ndọda?

• Azịza: Ike ike ndọda bụ ike ihe nwere n'ihi ọnọdụ ya n'ọhịa ndọda. Mgbanwe nke ike ndọda nke ihe metụtara ọrụ ike ndọda na-arụ ka ihe ahụ na-agagharị. Enwere ike inweta ubi ndọda site na gradient (ma ọ bụ ihe sitere na oghere) nke ike ndọda.