1-nazorat ishi nazorat shakli: Yozma ish 1

 

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5-NAZORAT ISHI 
 
Nazorat shakli: Yozma ish
 
1 1 m/s
2
tezlanish bilan tushayotgan liftdagi 20 kg massali bolaning 
vazni qanday(N)? g=10m/s
2
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2 2 kg massali yuk osilganda, 5sm uzunlikdagi prujina 1sm uzaydi. 
Prujinaning bikrligini aniqlang (N/m). 
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3 Arqon tortish musobaqasida to’rt kishi ishtirok etmoqda. Ulardan 
ikkitasi arqonni 250 va 200 N kuch bilan o’ng tomonga, qolgan ikkitasi 
350 va 50 N kuch bilan chap tomonga tortmoqda. Teng ta’sir etuvchi 
kuch qanday (N)? Arqon qaysi tomonga harakatlanadi? 
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