Question

A steel bar of 5 mm is heated from 25°c to 45°c and it is free to expand. The bar will induce a compressive stress b no stress c tensile stress d shear stress

Answer 1

no stress
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Answer 2

Answer:

No stress.

Explanation:

Given that,

A steel bar of 5 mm is heated from 25° C to 45° C and it is free to expand.

Then, No stress in the steel bar.

Because, when the bar is heated then the bar expended in all sides .

We draw the figure

In Compressive stress, The force apply on the object toward the center from both side.

In tensile stress, The force apply on the object outward the center from both side.

In shear stress, The force applied transversely on the object.