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shogunuz
@shogunuz
May 2021
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Каким должна быть наименьшая длина стального троса (км), подвешенного к вертолёту за один конец, чтобы он разорвался под собственной тяжестью? Передел прочности стали 5*10^8 Па, а плотность - 7,8гр/см^3.
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tana20101997
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Сигма=F/S=m*g/S=p*V*g/S=p*S*L*g/S=p*L*g
L=сигма/p*G=5*10^8/7800*10=6410 м
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Verified answer
Сигма=F/S=m*g/S=p*V*g/S=p*S*L*g/S=p*L*gL=сигма/p*G=5*10^8/7800*10=6410 м