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Mechanical Properties of Solids

If we compress or elongate the solids, what happens to potential energy of solid?

When a soild is compressed or elongated, it's P.E increases. Potential energy increases because work has to be done against force of repulsion during compression and against force of attraction during elongation.

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What is elastic fatigue and why bridges are declared unsafe after long use?

A rectangular beam is bent into arc of a circle. What type of strain is produced in it?

A piece of rubber under an ordinary stress can display 100% strain; yet when unloaded, it returns to its original length. Does this show that the restoring forces in a rubber piece are strictly conservative?

Plot the graph between intermolecular forces. What is the range of these forces? What is the range of these forces?

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