The load versus elongation graph for four wires of the same material and same length is shown in the figure. The thinnest wire is represented by the line

The breaking stress of a wire depends upon

Is stress a vector,scalar,or tensor?

Which one of the following quantities does not have the unit of force per unit area?

$A$ wire of length $l$ and cross-sectional area $A$ is stretched by a weight $Mg$ such that its length becomes double. What is the stress in the wire?

$A$ rod of constant cross-section moves towards the right with constant acceleration $a$. The graph of stress versus distance from the left end is shown in the figure. If the density of the material of the rod at cross-section $1$ is $9 \text{ g/cm}^3$,find the density at cross-section $2$ in $\text{g/cm}^3$.