Question

What force will be required to stretch a steel wire 1 sq cm cross-section to double its length? (y for steel is 2×10^12 n/m^2​

Answer 1

Hope this answer helped you

Explanation:

Given that,

Young modulus Y=1.26×10

12

dyne/cm

Area A=1cm

2

As the length of the wire is doubled, the change in length is equal to its

original length.

If L is the original length

Then, Δl=l

We know that,

Y=

A×ΔL

F×L

F=Y×A

F=0.126×10

12

×1×10

−4

F=1.2×10

7

N

Hence, the force is 1.2×10

7

N