7 sinf 9-mashq yechim - kopiya

7-sinf 9-mashq. 1. avtomobil g‘ildiragi 2 minutda 2400 marta aylansa, uning aylanish chastotasi va davrini toping. ______________ avtomobil g’ildiragining aylanish davri; aylanish davriga teskari kattalik, aylanish chastotasi deyiladi; 2. vertolyot parragining aylanish davri 0,02 s bo‘lsa, 10 s da necha marta aylanadi? ______________ vertolyot parragining aylanish davri; (1)-ifodadan aylanishlar soni; 3. vertolyot parragi 0,5 minutda 600 marta aylansa, uning aylanish davri qanday? ______________ vertolyot parragining aylanish davri; 4. ikkita velosipedchi aylanma yo‘lda bir vaqtda 5 m/s va 3 m/s tezlik bilan harakatlana boshladi. aylana uzunligi 75 m bo‘lsa, ularning har biri bu masofani qancha vaqtda to‘liq aylanadi? ______________ birinchi velosipedchining sarflagan vaqti; ikkinchi velos...

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