Question

A steel rod of length 1 m rests on a smooth horizontal base. If it is heated from 0°C to 100°C, what is the longitudinal strain developed?

Answer 1

The longitudinal strain developed is Zero.

Explanation:

• At 0 °C, the steel rod lies on a horizontal frame. When the temperature rises to 100 ° C.

• This will lead to an increase of the steel length due to heating expansion. Since there is no opposition in expanding the length, there will be no longitudinal strain. ΔL = 100°C
• A longitudinal strain develops if there is an opposition to the expansion, and only if.

• Hence the longitudinal stain here = Zero, since there is no opposition in this case.

Answer 2

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