Question

A wire of length l = 1.0 m and cross-sectional area α = 5.00 × 10 ^–4 cm² is stretched by load at mid point with a mass m= 100 g.Assuming stretching with inelastic limit, calculate the depression of wire at the mid point.

The Young’s modulus of elasticity is 1.9 × 10¹¹ Pa.

Answer 1

Let the depression be x. 

where z is elongation in the half length (l /2).

Putting the value