Answer:
0.0009196875 m
0.15328125 m
Explanation:
Y = Young's modulus
Stress is given by
[tex]\sigma=\dfrac{mg}{A}\\\Rightarrow \sigma=\dfrac{500\times 9.81}{80\times 10^{-6}}\\\Rightarrow \sigma=61312500\ Pa[/tex]
Change in length is given by
[tex]\Delta L=\dfrac{L\sigma}{Y}\\\Rightarrow \Delta L=\dfrac{3\times 61312500}{200\times 10^9}\\\Rightarrow \Delta L=0.0009196875\ m[/tex]
The change in length of steel is 0.0009196875 m
[tex]\Delta L=\dfrac{L\sigma}{Y}\\\Rightarrow \Delta L=\dfrac{3\times 61312500}{1.2\times 10^9}\\\Rightarrow \Delta L=0.15328125\ m[/tex]
The change in length of polypropylene is 0.15328125 m
