Dinamika Kuch Amaliy qism

C) 34 sm D) 0,17 sm

20. 
    Mexanik kuchlanishni qaysi formula
    

yordamida hisoblaymiz.
A) B)
C) D)

21. 
    2 N kuch ta’sirida 10 sm ga uzaygan rezinaning bikrligini toping.
    

A) B) C) D)

22. 
    Prujinali taroziga 1 kg yuk osilganda uning prujinasi 8 sm ga uzaygan. Prujinaning bikrligini toping. Ushbu va keyingi tegishli mashqlarda g = 10 m/s² deb olinsin.
    

A) B) C) D)

23. 
    O‘lchamlari 10 x 8 x 5 cm jezdan yasalgan brusokni prujinaga osib qo‘yilgan. Prujina qanday kuch yordamida cho‘zilgan? (jezning zichligini =8,5 g/cm³ deb oling)
    

A) B) C) D)

24. 
    Uzunligi L bo‘lgan pruninanng bikrligi k bo‘lsa, bikirligi 2 k bo‘li-shi uchun uning uzunligi qanday bo‘lishi kerak?
    

A) B) C) D) 2L

25. 
    Kondalang yuzasi 35 sm² ga teng bolgan metall bolagini 125 N kuch bilan cho’zsak unda hosil bo’lgan mexanik kuchlanish qanchaga teng bo’ladi.
    

A) 3.57 Pa B) 4375 Pa
C) 4,375 Pa D) 43,75 Pa

26. 
    Prujinani 100 N kuch tasirida 2 sm ga jo’zligan bo’lsa elastiklik kuchin toping?
    

A) 200 N B) 50 N
C) 2 N D) 100 N

27. 
    Agar prujinaning bikrligi 1kN/m bo’lgan simning yuzasi 40 mm² ga teng, uzuligi 1m ga teng bo’lsa yung modulini toping.
    

A) 25 Pa B) 25 MPa
C) 25 kPa D) 250 Pa

28. 
    Yung moduli 7 GPa bo’igan prujina-ning nisbiy uzayish deformatsiyasi 0,03 ga teng bo’lsa mexanik kuchlanishni toping.
    

A) 21 GPa B) 21 kPa
C) 210 kPa D) 210 Pa

29. 
    Prujinaning bikrligi 100 kN/m ga teng. Uning yarmining bikrligi qanchaga teng.