Question

What is the ratio of change in length to original length

Answer 1

Answer:

The tensile stress is the ratio of tensile force to the change i length. ... The ratio of change in length to the original length is the tensile strain.

Answer 2

The ratio of the change in length to original length is called strain.

Suppose, the length of a rod of any metal = L

                the change in length after applying a force = l

                Force applied = F

                Young's modulus = Y

                Area of cross section = A

As we know, Y = Stress/ Strain,

So, Y = $\frac{\frac{F}{A} }{\frac{l}{L} }$

or, l/L = F/YA

So, the ratio of the change in length to original length or the strain is F/YA.