Javob: A) O’zgarmaydi.
26.19. Parallel (yonma-yon )ulangan, bikirligi k bo’lgan ikkita bir xil prujinaga mahkamlangan m massali yukning tebranish chastotasi qandey?
A)
B)
C)
1 2
D)
2
Berilgan:
𝜈 =?
𝑘𝑢𝑚 = 𝑘1 + 𝑘2 = 𝑘 + 𝑘 = 2𝑘.
Prujinali mayatnikning chastotasini topish formulasidan foydalanamiz:
2 2𝜋
26.20. 6ℕ kuch ta’sirida 1,5 sm cho’ziladigan prujinaga 1 kg massali yuk osilgan.Shu yukning vetikal tebranishlar davri topilsin.
A) 0,628 B) 0,58 C) 0,314 D) 0,49
Berilgan:
F=6 N Yechilishi:Prujinali mayatnikning tebranish davrini
∆𝑥 = 1.5 𝑠𝑚 = 0.015𝑚 topish formulasidan foydalanamiz.
m=1kg
T=? 𝑇 .
Bu ifodalarga asosan:
𝑇 𝑠
Javob:A) 0.314.
26.21. Prujina o’ziga osilgan yuk ta’sirida 10 sm uzaydi. Shu mayatnikning bo’lama 𝑚 tebranishlar davrini toping . 𝑔 = 10 𝑠 2.
A) 0.157 B) 0.2 C)0.314 D)0.628
Berilgan:
∆𝑥 = 10𝑠𝑚 = 0.1𝑚 Yechilishi:Prujinali mayatnikning tebranish davrini to-
g=10m/𝑠2 pishi formulasidan foydalanamiz.
T=?
𝑚 𝐹 𝑝𝑜𝑔′ 𝑚𝑔
Τ = 2𝜋√ ; 𝑘 = = =
𝑘 ∆𝑥 ∆𝑥 ∆𝑥
Bu ifodalarga asosan:
Τ = 2𝜋 .
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