V bob. Tebranish va to’lqinlar. 25-&. Tebranma harakat energiyasi

Berilgan: Yechilishi: : Prujinali mayatnik uchun tebranish chastotasini
k = 0.2 N/m toppish formulasidan foydalanamiz:
T=2п s
____________ Ildizdan chiqarish uchun tenglamaning ikki tomonini kvadratga oshi-
m = ? miz:

Javob:B)0.20 kg
26.12.Bikirligi 500N/m bo’lgan prujina osilganda 4 s da 5 marta bo’ylama tebranadigan yukning massasi qanday?
A)10 B)0.125 C)8 D)4
Berilgan: Yechilishi: Prujinali mayatnik uchun tebranish davri
k = 500 N/m formulasidan foydalanamiz:
t = 4 s T= .
N = 5 Ikkala tenglamani tenglashtiramiz:
_____________ .
m = ? Ildiz chiqarish uchun tenglamaning ikki tomonini kvadratga oshiramiz:
Bu ifodadan quyidagini olamiz:
.
Javob: C)8
26.13. Bikrligi 125 N/m bo’lgan prujinaga osilgan yuk 8 s da 10 marta tebranmoqda.Yukning massasi qanday? ( )
A)6 B) 4 C)2 D)8
Berilgan: Yechilishi: Prujinali mayatnik uchun tebranish davri
k = 125 N/m formulasidan foydalanamiz:
t = 8 s T= .
N = 5 Ikkala tenglamani tenglashtiramiz:
= .
____________ Ildiz chiqarish uchun tenglamaning ikki tomonini kvadratga
m = ? oshiramiz:
.
Bu ifodadan quyidagini olamiz:

Jabob:B)2
26.14. Bikrligi 100 N/m bo’lgan prujinaga qanday (g) massali yuk osilganda,uning tebranish chastotasi 5 Hz bo’ladi?
A)10 B)25 C)50 D)100
Berilgan: Yechilishi: Prujinali mayatnik uchun tebranish chastotasini
k = 100N/m toppish formulasidan foydalanamiz:
v = 5 Hz .
Ildizini yo’q qilish uchun tenglamaning ikki tomonini kvadratga
_____________ osjiramiz:
m =? Bundan massani topamiz: