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Ishning maqsadi: Mayatnik tebranish davrining mayatnik ipi uzunligiga va og’ish burchagiga bog'liqiligini o'rganish hamda matematik mayatnik yordamida erkin tushish tezlanishini aniqlash. Kerakli asboblar: sharli mayatnik, sekundomer, o'lchash lentasi
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