Question

Why are the bridges declared unsafe after long use?
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Answer 1

$\underline{\underline{\Huge\mathfrak{Answer-: }}}$

A bridge during its use undergoes alternating stresses and strains for a large number of times each day, depending upon the movement of vehicles on it. When a bridge is used for long time, it loses its elastic strength. Therefore, the amount of strain in the bridge for a given stress will become large and ultimately, the bridge may collapse. That is why the bridges are declared unsafe after long

Answer 2

Explanation:

◆Beacuse ,the bridges lose its stability

◆It breaks down

◆Many people will get killed

◆So,bridges are unsafe after long use