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A steel rod has a radius R = 9.5 mm and ...

A steel rod has a radius R = 9.5 mm and length L = 81cm. A force `F= 6.2 xx 10^(4)N` stretches it along its length. What is the stress in the rod

A

`0.95 xx 10^(8) N//m^(2)`

B

`1.1 xx 10^(8) N//m^(2)`

C

`2.2 xx 10^(8) N//m^(2)`

D

`3.2 xx 10^(8) Nm^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Stress `= ("Force")/("Area") = (6.2 xx 10^(4))/(pi R^(2))= (6.2 xx 10^(4))/(3.14 xx (9.5 xx 10^(-3))^(2))`
`= 2.2 xx 10^(8) N//m^(2)`
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