Usoro maka iwu nchekwa ike igwe, ike nwere ike nke isi iyi, igwe dị mfe

Ajụjụ na usoro ihe atụ maka iwu nchekwa ike igwe, ike nwere ike nke mmiri, igwe dị mfe

Iwu nchekwa nke ike igwe

1. Ihe nwere ike mekanikal na-aga n'ihu, ike kinetic na-abawanye, na ike ndọda na-ebelata. Ihe ahụ nọ n'ọnọdụ nke….

1. diam
2. kwaga elu
3. kwaga ala
4. na-aga elu ọsọ ọsọ

Mkparịta ụka
Ka ike kinetic na-abawanye, otú ahụ ka ọsọ ihe ahụ na-abawanye, na ka ike ndọda na-adị obere, otú ahụ ka ịdị elu ihe ahụ na-ebelata n'elu ala. Nke a na-eme mgbe ihe si n'otu elu gaa n'ala.

A na-egosi mmekọrịta dị n'etiti ọsọ na ike kinetic site na usoro ike kinetic:
EK = ½ mv²
Nkọwa usoro: EK = ike kinetic, m = oke, v = ọsọ

A na-egosi mmekọrịta dị n'etiti ịdị elu na ike ike ndọda site na usoro ike ike ndọda:
EP = mgh
Nkọwa usoro: EP = ike ike ndọda, m = oke, g = osooso ike ndọda, h = elu
Azịza ziri ezi bụ C.

Igwe dị mfe
2. Oke nke ogologo a na b na eserese eserese nke igwe dị mfe bụ a : b = 1 : 2,2. Uru kacha nta nke ike F iji bulie ibu B nke dị kilogram 330 Newtons bụ…. Newton

1. 100
2. 150
3. 2200
4. 7260

Mkparịta ụka
A maara na:
Ogologo a = ogwe aka ibu (l)_B) = 1
Ogologo b = ogwe aka ike (l)_F) = 2,2
Ike ibu (w) = Newtons 330
A jụrụ: Ike ike (F)
Azịza:
Usoro maka uru igwe nke igwe lever dị mfe:
KM = w / F = l_F / l_B
Ozi:
KM = uru mekanik, w = ike ndọda, F = ike ndọda, l_F = ogwe aka ike, l_B = ogwe aka ibu
 
w / F = l_F / l_B
330 / F = 2,2 / 1
330 / F = 2,2
330 / 2,2 = F
F = 150 Newton
Azịza ziri ezi bụ B.

3. Lee foto dị n'akụkụ. Nwa akwụkwọ na-ebugharị ihe site na isi A gaa na isi B site na ike F dịka egosiri na foto a. Ọ bụrụ na eleghara esemokwu dị n'etiti ihe ahụ na bọọdụ anya, mgbe ahụ uru nke ihe omume ahụ bụ….

1. 4
2. 5/3
3. 5/4
4. 3/4

Mkparịta ụka
A maara na:
Ogologo nke elu elu ahụ gbagọrọ agbagọ (y) = mita 4 – mita 1 = mita 3
Ogologo ebe dị larịị (x) = mita 4
A jụrụ: Uru mekaniki (MC) nke ụgbọelu gbagọrọ agbagọ
Azịza:
Gbakọọ ogologo nke oghere ahụ gbagọrọ agbagọ site na iji usoro Pythagorean:
R = √3²+4² = √9+16 = √25 = mita 5
Uru nke igwe nke ụgbọelu gbagọrọ agbagọ:
KM = R / y
KM = mita 5 / mita 3
KM = 5/3
Azịza ziri ezi bụ B.

Ike Nwere Ike Oge opupu ihe ubi

4. Ebe egwuregwu ịgba mmiri na-eji ntọala mmiri nke nwere spring loaded iji nye onye egwuregwu ume elu iji malite ịwụli elu. Mgbe onye egwuregwu wụliri elu na ike nke 500 N, spring na-ebelata site na 4 cm. Oke ike nke spring na-enye iji mee ka onye egwuregwu nwee ike….

1. Ọnwa Iri na Abụọ 20
2. Ọnwa Iri na Abụọ 10
3. Ọnwa Iri na Abụọ 5
4. Ọnwa Iri na Abụọ 2

Mkparịta ụka
A maara na:
Ike (F) = 500 N
Mgbanwe n'ogologo oge opupu ihe ubi (Δx) = 4 cm = 0,04 m
A jụrụ: Ike ike oge opupu ihe ubi
Azịza:
Nke mbụ, gbakọọ ihe na-agbanwe agbanwe nke oge opupu ihe ubi site na iji usoro iwu Hooke:
k = F / Δx = 500 N / 0,04 m = 12500 N/m
Ike ike nke oge opupu ihe ubi bụ:
EP = ½ k Δx² = ½ (12500)(0,04)² = (6250)(0,0016)
EP = 10 Joule
Azịza ziri ezi bụ B.

Isi mmalite ajụjụ:

Ajụjụ gbasara Fizik nke Ụlọ Akwụkwọ Sekọndrị nke Junior