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A steel wire of 2mm in diameter is stret...

A steel wire of 2mm in diameter is stretched by applying a force of 72N. Find the stress in the wire.

Text Solution

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`r = 1 xx 10^(-3)m, F= 72N`
The stress `= (F)/(A)= (F)/(pi r^(2))= (72)/(pi(1 xx 10^(-3))^(2))`
` =(72)/(pi xx 10^(-6))= 2.292 xx 10^(7)Nm^(-2)`.
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