Question

A mild steel wire of length 2L and cross-sectional area A is stretched, well within elastic limit, horizontally between two pillars (Fig. 9.1). A mass m is suspended from the mid point of the wire. Strain in the wire is

(a) X²/2L² 

(b) X/L

(c) X²/L

(d) X²/2L

Answer 1

Strain in the wire is -(a)  X²/2L²