$A$ wire is hanged from the ceiling without any weight below it. Would there be any stress in the wire?

The breaking stress of aluminium is $7.5 \times 10^7 \,N m^{-2}$. The greatest length of aluminium wire that can hang vertically without breaking is ......... $\times 10^3 \,m$ (Density of aluminium is $2.7 \times 10^3 \,kg m^{-3}$ and $g = 9.8 \,m s^{-2}$)

Define longitudinal strain and shearing (tangential) stress and write their formulas. What is the magnitude of hydraulic stress?

Distinguish between a liquid body and a solid body.

According to Hooke's law,force is proportional to:

If a load of $9 \, kg$ is suspended on a wire,the increase in length is $4.5 \, mm$. The force constant of the wire is