Let a wire be suspended from the ceiling (rigid support) and stretched by a weight $W$ attached at its free end. The longitudinal stress at any point of cross-sectional area $A$ of the wire is:

A Zero

B $\frac{2W}{A}$

C $\frac{W}{A}$

D $\frac{W}{2A}$

The answer is C.

Solution

Stress $=\frac{F}{A}=\frac{W}{A}$.

Stress $=\frac{F}{A}=\frac{T}{A}=\frac{W}{A}$

Concept longitudinal stress

15 questions from this chapter have appeared across 11 exam years.