Question

An elongation of an elastic string is a metre when longitudinal tension

Answer 1

Hey buddy.....

$we \: know \: that \: \gamma = \frac{force}{area } \div \frac{ del \: l}{l}$
y=1N/1m^2÷∆l/1m......here youngs modulus will be equal to 1 N/m^2...
so , we get longitudinal strain ∆l =1 metre..
I hope u understand.
thanks...