1.) A steel railroad track has a length of 23 m when the temperature is 6◦C. What is the increase in the length of the rail on a hot day when the temperature is 40 ◦C? The linear expansion coefficient of steel is 11 × 10−6 (◦C)−1.Answer in units of m.
2.)Suppose the ends of the rail are rigidly
clamped at 6◦C to prevent expansion.
Calculate the thermal stress in the rail if
its temperature is raised to 40 ◦C. Young’s
modulus for steel is 20 × 1010 N/m2.Answer in units of N/m2.
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