Жауабы: A steel wire of diameter 2 mm and the length 5 m is suspended from a fixed point. 90 N wei
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A steel wire of diameter 2 mm and the length 5 m is suspended from a fixed point. 90 N weight is suspended from its free end. Young modulus of material of the wire is $2.1 \cdot 10^{11} \text{ Pa}$. The extension of wire is equal to