1.

\begin{array} { l } { \text { A steel wire is } 1 \mathrm { m } \text { long and } 1 \mathrm { mm } ^ { 2 } \text { in area of cross- } } \\ { \text { section. If it takes } 200 \mathrm { N } \text { to stretch this wire by } 1 } \\ { \mathrm { mm } \text { , how much force will be required to stretch a wire } } \\ { \text { of the same material as well as diameter from its } } \\ { \text { normal length of } 10 \mathrm { m } \text { to a length of } 1002 \mathrm { cm } \text { ? } } \end{array}

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