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

Javob: C)k=2N/m.
26.8. Prujinaga 100 g yuk osilgan va u minutiga 120 marta tebranadi.Prujinaning bikrligi qanday?
A)16 B)40 C)120 D)160
Berilgan: Yechilishi: prujinali mayatnik uchun tebranish davri
m = 400 g =0.4 kg toppish formulasidan foydalanamiz:
t = 1min =60 s .
N = 30 Ikkala tenglamani tenglashtiramiz:
_________________
k = ? Ildizdan chiqarish uchun tenglamalarning ikki tomonini kvadratga oshiramiz:

Bu ifodadan quyidagini olamiz:

Javob:_A)16_26.9.'>Javob:A)16
26.9. Ikkita bir xil prujinali mayatnikning tebranish chastotalari nisbati : bo’lsa,har bir prujinaga osilgan yuklar massalarining nisbati qanday?
A) : B)5:2 C)4:25 D) :
Berilgan: Yechilishi: Prujinali mayatnik uchun tebranish chastotasini
toppish formulasidan foydalanamiz:
________________
Bu ifodalaning nisbatini olamiz:

Olingan ifodani ikki tomonini kvadratga oshirsak,quyidagiga ega bo’lamiz:

Bu ifodadan quyidagi munosabatni olamiz:

Javob:B)5:2.
26.10. Birkligi 10 N/m li prujinaga qanday kg yuk osilsa, tebranish davri 1 s bo’lgan mayatnik hosil bo’ladi?
A)10 B)0.25 C)2.5 D)0.025
Berilgan:
k = 10 N/m
T = 1s Yechilishi: : Prujinali mayatnik uchun tebranish chastotasini
toppish formulasidan foydalanamiz:
____________
m = ? Ildizdan chiqarish uchun tenglamaning ikki tomonini kvadratga oshiramiz:
Javob:B)0.25 kg
26.11.Elastikli (qayishqoqligi) 0.2 N/m bo’lgan prujinali mayatnikning tebranish davri 2п sekundga teng bo’lishi uchun prujinaga osilgan yukning massasi qanday (kg) bo’lishi kerak?
A)0.05 B)0.20 C)0.15 D)0.50