Laboratoriya ishi №1 13 §

Ishning natijasi:

№

S,m

t1, s

t2, s

t3, s

t4, s

t5, s

a1

a2

a3

a4

a5

ao’rt

1.

2.

3.

4.

5.

a₁ = 2S / t² =

a₂ = 2S / t² =

a_{3 =} 2S / t² =

a₄ = 2S / t² =

a₅ = 2S / t² =

a_o’rt = ( a₁ + a₂ + a₃ + a₄ + a₅ )/5 =

Javoblar:
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Bahosi: ________ Tekshirdi :_________________
2-Laboratoriya ishi
Purjina bikirligini aniqlash


Ishning maqsadi: Eng oddiy dinamometr prujinasining bikirligini aniqlash orqali jismlarning deformatsiyasi va bikirligi haqida tasavvurlarni kengaytirish, elastiklik kuchi haqida olingan nazariy bilimlarni mustahkamlash.
Kerakli jihozlar: Shtativ, eng oddiy dinamometr, yuklar to’plami, millimetrli qog‘oz.

2-rasm

Ishni bajarish tartibi

1. Prujinadan dinamometr yasash uchun shkalasiga millimetrli qog‘oz yopishtiring.
2. Dinamometrni shtativga 2-rasmda ko‘rsatilgani dek mahkamlang.
3. Dinamometr ko’rsatkichining boshlang’ich vaziyatini shkaladagi millimetrli qog‘ozga belgilang.
4. Dinamometr ilgagiga m₁ massali yukni iling, uning tasirida prujinaning Δl₁ uzayishini o‘lchang va natijani jadvalga yozing.
5. Massalari m₂ va m₃ bo‘lgan yuk uchun ham prujinaning Δl₂, Δl₃ cho‘zilishlarini o‘lchang va natijalarni jadvalga yozing.
6. Dinamometrga osilgan har bir yuk uchun prujinaga ta’sir etgan tashqi kuchlarni Ft=mg formula bo‘yicha hisoblang va natijalarni jadvalga yozing
(g = 10 m/s² deb oling).
7. Har bir o‘lchangan Δl1, Δl2, Δl3 va hisoblangan Ft₁, Ft₂, Ft₃ natijalarni
k = F_t /Δl formulaga qo‘yib, k₁, k₂, k₃ prujinalar bikirligini hisoblang va
natijalarni jadvalga yozing.
8. k_o‘rt= ( k1+ k2+ k3)/3 formula bo’yicha prujina bikirligining o’rtacha
qiymatini hisoblang va natijani jadvalga yozing.

m₁ =

F₁= m₁g =
Δ l₁ = l₂-l₁= F=-kΔl
k₁=F / Δ l₁=
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m₂ =
F₂= m₂g =
Δ l₂ =l₂-l₁=
k₂=F/ Δ l₂ =
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m₃ =

F₃=m₃g=
Δl₃ =l₂-l₁=
k₃=F/Δl₃ =
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K_o’rt=(k₁+k₂+k₃) / 3=

№	m	F	Δl	k	K o’rt
1
2
3

Javoblar:

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Bahosi: ________ Tekshirdi :_______________

№3Laboratoriya ishi
Sirpanish ishqalanish koeffisentini aniqlash


Ishning maqsadi: yog’ch chizg’ich ustida sirpanayotgan taxtachaning
ishqalanish koeffitsiyentini aniqlash yordamida sirpanish ishqalanishga oid bilimlarini mustahkamlash.
Kerakli jihozlar: uzun yog’och chizg’ich, ilgakli taxtacha, dinamometr,
tarozi, tarozi toshlari.

Ishni bajarish tartibi
1. Tarozida taxtachaning massasini o’lchang va jadvalga yozing.
2. P = mg formuladan foydalanib, taxtachaning og’irligini toping.
3. Taxtachaga dinamometrni ilib, uni chizg’ich bo’ylab tekis sirpantiring va dinamometrning ko‘rsatishini Fi(s) sirpanish ishqalanish kuchiga
teng deb olib, uni jadvalga yozing.
4. 121-betdagi (4) formuladan foydalanib, sirpanish ishqalanish koeffitsiyentini
hisoblang.
5. Taxtacha ustiga avval 100 g li, so’ngra 200 g li tarozi toshlarini qo’yib, tajribani takrorlang. Ular uchun ham sirpanish ishqalanish kuchini toping. Natijalarni jadvalga yozing.
6. μo‘rt = (μ1 + μ2 + μ3)/3 formuladan foydalanib, sirpanish ishqalanish
koeffitsiyentining o’rtacha qiymatini hisoblang va natijani jadvalga yozing.

№	m, kg	P, N	Fs, N	µ	µ o’rta
1
2
3

1) m=
P=mg=
Fs=

2) m=
P=mg=
Fs=

3) m=
P=mg=

Fs=

Javoblar:___________________________________________________________________________________________________________________________________________________________________

Bahosi: ________ Tekshirdi :_____________________________

№4Laboratoriya ishi
Jismni ko’tarishda va uni shu masofaga garizantal ko’chirishda bajarilgan ishnib hisoblash
Ishning maqsadi: Jism vertikal va gorizontal yo‘l bo‘ylab ko‘chirilganda bajarilganishni mustaqil ravishda hisoblash.
Kerakli jihozlar: Laboratoriya tribometri, o‘quv dinamometri, santimetrli
bo‘limlarga ega bo‘lgan o‘lchov tasmasi, 2 dona ikkita ilmoqli 100 g massali yuk, brusok, chizg‘ich.


3-rasm
.
Ishni bajarish tartibi.
1. Jihozlardan 3-rasmda ko‘rsatilgan qurilmani yig‘ing.
2. Dinamometr yordamida brusok og‘irligini o‘lchang. So‘ngra brusokni yuqoriga tekis harakatlantirib, oldindan tasma yordamida o‘lchangan tribometr chizg‘ichi balandligiga ko‘taring. Bajarilgan ishning kattaligini quyidagi formula bilan hisoblang: A = F_og’ . h.
3. Tajribani uch marta takrorlang. Har tajribada brusokka 0,81 N; 1,81 N; 2,81 N yuklar osing va bu bajarilgan ish og‘irlik kuchini yengish uchun sarf bo‘lganini qayd qiling.
4. Topilgan natijalarni jadvalga yozing.
5. Chizg‘ichni stolga qo‘yib, dinamometr yordamida brusokni chizg‘ich bo‘ylab birinchi holdagi masofaga bir tekis ko‘chiring. Bunda hosil bo‘lgan tortishish kuchini dinamometr ko‘rsatishi F_t dan aniqlang.
6. Ishni yana tortishish kuchi va yo‘lga ko‘ra hisoblang: A = F_t S. Diqqatingizni bu ish og‘irlik kuchini emas, balki ishqalanish kuchini yengishda bajarilganligiga qarating. So‘ngra brusokka 0,81 N; 1,81 N; 2,81 N yuklarni osib, tajribani uch marta takrorlang va har safar tortish kuchi bajargan ishni hisoblang. Topilgan natijalarni jadvalga yozing.
Natijalari: F=2N A₁=FS=2N*0,5 m=1 J

№	Fa		Fs	A
1
2
3

Javoblar:

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Bahosi: ________ Tekshirdi :______________

№5 Laboratoriya ishi
Jismni kinetik energiyasining uning tezligiga bog’liqliligini aniqlash.


Ishning maqsadi: Turli massali sharlar tezligini o‘zgartirib, kinetik energiya ishqalanish kuchini yengishini kuzatish yordamida energiyaga oid bilimlarini mustahkamlash.
Kerakli jihozlar: Turli massali 2 ta po‘lat sharcha, metall nov, brusok,
o‘lchov tasmasi, sekundomer, shtativ.
Ishni bajarish tartibi.
1. 4-rasmda ko‘rsatilganidek shtativ yordamida novni qiya holatda o‘rnating. novning pastki uchiga brusokni tirab qo‘ying.
2. Novning o‘rta qismiga kichik massali sharchani qo‘ying va uni qo‘yib yuborib, nov bo‘ylab qanday dumalashi, yog‘och brusokka kelib urilishi, ishqalanish kuchini yengishi va brusokni ma’lum masofaga siljitishini kuzatib boring.
3. Brusok siljib qolgan masofa Δl ni o‘lchang.
5. Katta massali sharchani novning o‘rta qismidan qo‘yib yuboring va brusokning
siljishini yana qayta o‘lchang.
6. 1-laboratoriya ishidagi kabi masofa va vaqtni o‘lchab, sharcha olgan tezlanishni toping. Tezlanish va vaqt ko‘rsatkichlaridan foydalanib, sharchaning brusokka urilish vaqtidagi tezligini aniqlang va E_k=mv²/2 formuladan kinetik energiyani toping.
7. Brusokning surilishida bajarilgan ish va kinetik energiya orasidagi bog‘lanish natijalarini tahlil qiling va xulosa chiqaring.

4-rasm
Javoblar:
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Bahosi: ________ Tekshirdi :_____________________________