Tsarin dokar kiyaye makamashin injiniya, makamashin da za a iya samu daga maɓuɓɓuga, injina masu sauƙi

Tambayoyi da dabaru na misali don dokar kiyaye makamashin injiniya, makamashin da za a iya samu daga bazara, injuna masu sauƙi

Dokar kiyaye makamashin inji

1. Abu yana da kuzarin inji mai ɗorewa, yana ƙara kuzarin motsi, da kuma rage ƙarfin ƙarfin nauyi. Abu yana cikin yanayi na….

1. diyam
2. matsa sama
3. matsa ƙasa
4. ƙara sauri zuwa sama

Tattaunawa
Mafi girman kuzarin motsi, gwargwadon saurin abu, da kuma ƙaramar ƙarfin ƙarfin nauyi, gwargwadon ƙimar abin da ke sama da ƙasa. Wannan yana faruwa ne lokacin da abu ya motsa daga wani tsayi zuwa ƙasa.

An nuna alaƙar da ke tsakanin gudu da kuzarin motsi ta hanyar dabarar makamashin motsi:
EK = ½ mv²
Bayanin dabara: EK = kuzarin motsi, m = taro, v = gudu

An nuna alaƙar da ke tsakanin tsayi da ƙarfin ƙarfin nauyi ta hanyar dabarar ƙarfin nauyi:
EP = mgh
Bayanin dabara: EP = kuzarin ƙarfin nauyi, m = taro, g = hanzarin nauyi, h = tsayi
Amsar da ta dace ita ce C.

Inji mai sauƙi
2. Rabon tsayin a da b a cikin zane mai tsari na na'ura mai sauƙi shine a : b = 1 : 2,2. Mafi ƙarancin ƙimar ƙarfin F don ɗaga kaya B mai nauyin 330 Newtons shine…. Newton

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

Tattaunawa
An san cewa:
Tsawon a = hannun kaya (l)_B) = 1
Tsawon b = hannun ƙarfi (l)_F) = 2,2
Nauyin kayan (w) = Newtons 330
An tambaya: Ƙarfin amfani (F)
Amsa:
Tsarin da ke nuna fa'idar injina mai sauƙi:
KM = w / F = l_F /l_B
Bayani:
KM = fa'idar injiniya, w = nauyi, F = ƙarfin aiki, l_F = hannun ƙarfi, l_B = hannun jari
 
w / F = l_F /l_B
330 / F = 2,2 / 1
330 / F = 2,2
330 / 2,2 = F
F = 150 Newton
Amsar da ta dace ita ce B.

3. Kalli hoton da ke gefe. Ɗalibi yana motsa abu daga wuri A zuwa wuri B da ƙarfi F kamar yadda aka nuna a hoton. Idan aka yi watsi da gogayya tsakanin abu da allo, to fa'idar aikin shine….

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

Tattaunawa
An san cewa:
Tsayin jirgin sama mai karkata (y) = mita 4 – mita 1 = mita 3
Tsawon faɗin fili (x) = mita 4
An tambaya: Fa'idar injina (MC) na jirgin sama mai karkata
Amsa:
Lissafa tsawon jirgin da aka karkata ta amfani da dabarar Pythagorean:
R = √3²+4² = √9+16 = √25 = mita 5
Fa'idodin injina na jirgin sama mai karkata:
KM = R / y
KM = mita 5 / mita 3
KM = 5/3
Amsar da ta dace ita ce B.

Makamashin Da Zai Iya Rage Makogwaro

4. Filin nutsewa yana amfani da tushe mai cike da ruwa don samar da ƙarfin tashi ga ɗan wasa don fara tsalle. Lokacin da ɗan wasa ya yi tsalle a kansa da ƙarfin N 500, bazarar tana raguwa da cm 4. Adadin kuzarin da bazarar ke bayarwa don tura ɗan wasa shine….

1. Joules 20
2. Joules 10
3. Joules 5
4. Joules 2

Tattaunawa
An san cewa:
Ƙarfi (F) = 500 N
Canji a tsawon bazara (Δx) = 4 cm = 0,04 m
An tambaya: Ƙarfin kuzarin bazara
Amsa:
Da farko, ƙididdige ma'aunin ma'aunin roba na bazara ta amfani da dabarar dokar Hooke:
k = F / Δx = 500 N / 0,04 m = 12500 N/m
Ƙarfin ƙarfin roba na bazara shine:
EP = ½ k Δx² = ½ (12500)(0,04)² = (6250)(0,0016)
EP = Joule 10
Amsar da ta dace ita ce B.

Tushen tambaya:

Tambayoyin OSN na Makarantar Sakandare ta Junior Physics