Physics

Problem

A steel wire under a constant tension of

200\,\text{N}

must carry wave pulses

20\,\text{m}

0.40\,\text{s}

. The density of steel is

7.8\times10^{3}\,\text{kg/m}^3

. What wire diameter will meet this requirement? (Assume the wire is perfectly cylindrical.) a)

2.5\,\text{mm}

5.5\,\text{mm}

3.6\,\text{mm}

1.8\,\text{mm}